JP2003329461A - Navigation device, map display device, map display method, program - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a navigation device or the like that can easily obtain information visually. SOLUTION: After a current position is measured and a wide-area map including the measured current position is read, coordinate conversion for enlarging a circular area a surrounding the current position to an area corresponding to an area b is performed. Area A (enlarged map) obtained by enlarging area a is superimposed and displayed on a portion corresponding to the current position in area C (wide area map).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a navigation device and the like, and more particularly to a navigation device and the like for enlarging and displaying a partial area in a map.

[0002]

2. Description of the Related Art In recent years, GPS (Global
Positioning System (Global Positioning System) Navigation devices that can obtain the current position and moving speed in real time using satellites are becoming widespread for use in mobile units such as automobiles or for portable use. In the navigation device, the map is displayed on the monitor based on the digitized map data. In this type of navigation device, a detailed map (enlarged map) is displayed when driving on a complicated road such as an urban area, or when driving on a highway or a suburban road. A wide-area map (wide-area map) is displayed on the screen, and the map displayed on the screen can be changed according to the road conditions currently running. However, in such a navigation device, when an enlarged map is displayed in order to see the details of the road around the current position, the display area of the entire map displayed on the screen becomes narrow and it becomes impossible to see ahead. When a wide area map is displayed in order to see the road conditions, there is a problem that the map displayed on the screen is too rough and the details of the road around the current position cannot be understood.

In order to solve such a problem, conventionally, a wide area map and an enlarged map are displayed in parallel on a monitor. Here, FIG. 11 shows an example of the wide area map 100a and the enlarged map 100b displayed on the monitor. Here, in the wide area map 100a, a plurality of roads 101a to 101i and a road 102a are arranged so as to be orthogonal to each other.
It is assumed that 102i is displayed. Further, a pointer 103 indicating the current position and traveling direction is displayed at the center of the wide area map 100a. On the other hand, the enlarged map 100b is the pointer 10 in the wide area map 100a.
3, that is, the area 104 centered around the current position is enlarged. Then, in the enlarged map 100b, the pointer 105 indicating the current position and the traveling direction, and the area 1
Roads 101d to 101f and roads 102d to 1 in 04
02f is enlarged and displayed.

[0004]

However, when two maps are displayed in parallel on the monitor, the display area per one map becomes small, so that the visibility of each map decreases and the monitor There was a problem that it was difficult to grasp the information from. In order to solve this, it is conceivable to increase the screen size of the monitor, but in addition to increasing the cost, a space for installing a large-screen monitor is required, so it is a limited space for in-vehicle use etc. There was a risk that it could not be installed in. In addition, since it is necessary to confirm the wide area map and the enlarged map separately, there is a problem that the on-vehicle type may hinder driving. In recent years, a technique for enlarging and displaying a partial area in the wide area map has been proposed, but in this type of technology, unless a user (for example, a driver) specifies an area to be enlarged and displayed. Therefore, it is impossible to solve the problem that the operation becomes complicated and the operation is hindered.

The present invention has been made to solve the above technical problems, and an object of the present invention is to provide a navigation device, a map display device, a map display method, etc., in which information can be easily obtained visually. It is in.

[0006]

A navigation device of the present invention includes a positioning means for positioning the current position, a map data acquisition means for acquiring map data, and an area to be displayed including the current position cut out from the map data. With regard to the display, using a wide area map based on map data and an enlarged map including the current position and enlarged from the wide area map, a display in which the current position in the enlarged map is superimposed on a portion corresponding to the current position in the wide area map It is characterized by comprising display map data generating means for generating use map data and display means for displaying a map based on the display map data. In this navigation device, since an enlarged map near the current position is displayed at a site corresponding to the current position in the wide area map, it is necessary to check the wide area map and the enlarged map at the same time, that is, the road condition of the destination and the vicinity of the current position. It is possible to easily and simultaneously know the details of the road.

Further, in such a navigation device, the display map data generating means includes a connection map obtained by processing the map data so that the map information of the enlarged map periphery and the map information of the wide area map are connected. Map data for use can be generated. Here, the map information includes, for example, a route, a river, a railroad, a building, an intersection, and the like, but it is particularly preferable that the route is connected. In such a navigation device, in addition to the wide area map and the enlarged map, the boundary portion of the wide area map and the enlarged map are also displayed at the same time. Therefore, for example, a route in the enlarged map is connected to which route in the wide area map. You can easily know what is happening. In such a navigation device, if the enlargement ratio of the enlarged map and the formation area of the connection map are associated with each other, the connection map can be displayed in an easy-to-understand manner.

Further, the map display device of the present invention relates to a map data acquisition means for acquiring map data, a region to be displayed cut out from the map data, a wide area map based on the map data, and a predetermined area in the wide area map. A region corresponding to a predetermined area of the wide area map using the enlarged map and the connected map in which the map data is processed so that the map information at the inner edge of the wide area map and the map information at the outer edge of the wide area map are connected. And a display map data generating means for generating display map data in which the enlarged map is overlapped with the enlarged map and the connection map is overlapped between the wide area map and the enlarged map, and the map is displayed based on the display map data. And a display means. It should be noted that the predetermined area here includes not only the current position but also an area other than the current position. In this map display device, an enlarged map in which a predetermined area is enlarged is displayed in a region corresponding to the predetermined area in the wide area map, and a connection map is displayed between the wide area map and the wide area map. By checking the map and the enlarged map at the same time, that is, it is possible to simultaneously and easily know the road condition in a wide area and the details of the road around the predetermined area. It can be easily known whether or not the route is connected.

Further, the map display method of the present invention includes the steps of detecting a current position, generating a wide area map including the current position, and generating an enlarged map in which a predetermined area including the current position in the wide area map is enlarged. And a step of displaying the current position of the enlarged map by superimposing it on the site corresponding to the current position in the wide area map.

Further, the map display method of the present invention includes the steps of generating a wide area map, and a step of generating an enlarged map in which a predetermined area in the wide area map is enlarged and a connection map connecting the periphery of the enlarged map and the wide area map. And a step of superimposing and displaying the enlarged map and the connection map on a site corresponding to a predetermined region in the wide area map.

Further, the program of the present invention has a function of causing a computer to read map data and generate a wide area map including the current position, and a function of generating an enlarged map in which a predetermined area including the current position in the wide area map is enlarged. And a function of superimposing and displaying the current position of the enlarged map on a portion corresponding to the current position on the wide area map.

Further, the program of the present invention connects a computer with a function of reading out map data to generate a wide area map, an enlarged map in which a predetermined area in the wide area map is enlarged, and a periphery of the enlarged map and the wide area map. It is characterized by realizing a function of generating a connection map and a function of superimposing and displaying an enlarged map and a connection map on a portion corresponding to a predetermined area in a wide area map.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below in detail based on the embodiments shown in the accompanying drawings. —First Embodiment— FIG. 1 is a block diagram for explaining the overall configuration of the navigation device 1 according to the first embodiment. As shown in FIG. 1, the navigation device 1 according to the present embodiment
Is a speaker 11 that outputs voices for guidance, a keyboard, a mouse, an operation unit 12 that receives an input from a user such as a remote controller or a control panel,
A communication terminal 13, which is a communication means for connecting to the Internet or the like, a CD (Compact Disc) -ROM (Read Only Me) in which map data of a predetermined wide area is stored.
(Mory) or DVD (Digital Versatile Disc) -ROM, a disk drive 14 equipped with a recording disk, a display unit 15 including a monitor such as a liquid crystal display for displaying images such as maps, a positioning block for positioning the vehicle position. 16, a control block 17 for controlling the entire apparatus, and a traffic information receiving block 18 for acquiring traffic information such as traffic jams, accidents, traffic regulations, and parking lots.

The recording disc stores a plurality of types of map data of different scales for the same area. Further, point data such as nodes (points) and search data such as facility names are also stored in the recording disk in association with the map data. The positioning block 16 is GP
GPS antenna 2 for receiving signals transmitted from S satellites
1. GPS positioning unit 22 that performs positioning based on the signal obtained from GPS antenna 21, vehicle speed sensor 23 that detects the vehicle speed of a vehicle equipped with navigation device 1, gyro sensor 24 that detects rotational displacement of the vehicle, vehicle speed sensor A positioning correction unit 25 that corrects the positioning result of the GPS positioning unit 22 based on the detection values obtained by the 23 and the gyro sensor 24.

The control block 17 includes a CPU 30 and a DRAM (Dynamic Rand) for controlling the entire system and performing arithmetic processing.
R as an internal storage device including om access memory)
AM 31, ROM 32 in which a predetermined program for operating the navigation device 1 is stored, speaker 11
Voice control unit 33 for controlling the voice output by the operation unit 1
2, an input control unit 34 that controls an input signal from the device 2, a route setting control unit 35 that calculates a recommended route based on a departure place, a waypoint, and a destination set by the user, a detachable mobile phone terminal, PDA (Personal Digital Assistant)
t) such as a communication unit 36 that communicates with the Internet or the like through the communication terminal 13 such as a portable information terminal, a storage control unit 37 that controls the disk drive 14, etc., a display control that controls the display of maps and other items on the display unit 15. The unit 38 is provided. Here, the display control unit 38 includes a graphic controller 38a that performs display control and a video RAM 3
8b and.

The traffic information receiving block 18 includes an FM multiplex receiver 41, a beacon receiver 42, and a traffic information processing controller 43. This FM multiplex receiver 41 is
An FM multiplex broadcast wave containing traffic information data is received by the FM antenna, and demodulated to output multiplexed traffic information data. In addition, the beacon receiver 42 uses a beacon antenna to transmit radio waves (or light).
A signal including traffic information data from a beacon transmitter is received, and the signal is demodulated to obtain and output the traffic information data. Further, the traffic information processing control unit 43
Traffic information data such as traffic congestion information received by the FM multiplex receiver 41 and the beacon receiver 42, so-called VI
The CS information is processed, and the traffic information data received by the FM multiplex receiver 41 and the beacon receiver 42 is stored in the RAM 3
Store in 1.

FIG. 2 shows the basic processing flow until the map corresponding to the current position (current position) is displayed.
In this navigation device 1, first, the positioning correction unit 25 of the positioning block 16 acquires the data of its own position. In addition, the positioning correction unit 2 is repeated every predetermined time.
If the data of the own position is acquired twice or more by the positioning in 5, the traveling direction of the own vehicle can be acquired (step S11).
Then, the map data corresponding to the own position is acquired from the recording disk (step S12), the coordinates of the acquired map data are converted (step S13), and the map after the coordinates conversion is displayed on the display unit 15 (step S14). ). Incidentally, the map data may be read from the communication disc 13 in addition to being read from the above-mentioned recording disk.

Here, FIG. 3 shows the details of step S13, that is, the flow of the process of converting the coordinates of the map data.
(A) shows the coordinates in the map data before the coordinate conversion as shown in FIG.
(B) shows the coordinates in the map data after the coordinate conversion, respectively. In FIG. 4A, the area within the radius r _i centering on its own position is the area a, the area exceeding the radius r _i and within the radius r _o is the area b, and the area exceeding the radius r _o is the area c. I am trying. The coordinates in area a are P
_{i (x i, y i)} , the coordinates of the area _{b P m (x m, y} m),
The coordinates in area c are indicated by P _o (x _o , y _o ). On the other hand, in FIG. 4B, the radius R centering on the own position is used.
The area within _o is area A, and the area exceeding the radius R _o is area C. The coordinates in area A are Q _i (X _i , Y
_i ) and the coordinates in the area C are indicated by Q _o (X _o , Y _o ).

In this process, first, a new coordinate P (x, y) from the map data acquired from the recording disk is used.
Is selected (step S101). Then, it is determined whether or not the selected coordinates are within the area a (step S102). Here, when the selected coordinate exists in the area a, the coordinate is converted by the coordinate conversion calculation 1 shown below to obtain the enlarged converted coordinate Q _i (X _i , Y _i ) (step S103).

[0020]

[Equation 1]

On the other hand, if the selected coordinate does not exist in the area a, then it is judged whether or not the selected coordinate exists in the area b (step S104). here,
If the selected coordinate does not exist in area b (if it exists in coordinate area c), this coordinate is converted to non-converted coordinate Q.
_It is stored in the main memory together with the transformed coordinate Q _i (X _i , Y _i ) obtained in step S103 as _o (X _o , Y _o ) (step S105). On the other hand, if the selected coordinate exists in the area b, the process proceeds to the next step without storing the coordinate. If the selection of all areas of the map data has not been completed, the process returns to step S101 and the above process is repeated. On the other hand, when the selection for all areas of the map data is completed, this process is ended (step S106).

As a result, the map data shown in FIG. 4 (a) is rewritten to the display map data shown in FIG. 4 (b). That is, the area a of the original map data is enlarged and converted into the area A having the radius R _o , and is surrounded by the area C which is not enlarged and converted.

FIG. 5 (a) shows an example of the map data 50 before coordinate conversion corresponding to FIG. 4 (a). here,
The map data 50 includes a plurality of roads 51a that are orthogonal to each other.
˜51i and roads 52a to 52i are displayed. A pointer 53 indicating the current position and the traveling direction is shown in the center of the figure. On the other hand, FIG.
4A shows map data 60 corresponding to FIG. 4B and obtained after coordinate conversion of the above FIG. 5A. Further, a pointer 54 indicating the current position and the traveling direction is displayed in the center of the figure. In the present embodiment, the above-described coordinate conversion is performed to expand the circular area a covering the periphery of the current position shown in FIG. 5A to the area b shown by the broken line in FIG. It is possible to obtain a composite map of area C (wide area map) and area A (enlarged map) shown in FIG. In this example, in area A,
The vicinity of the intersection of the road 51e and the road 52e corresponding to the current position is enlarged and displayed, and the landmarks and the like existing near this intersection are also displayed at the same time.

In the present embodiment, since the enlarged map centering on its own position is displayed on the wide area map, a map that is easy to see can be obtained. Also, because it is possible to display a wide area map with a different scale and an enlarged map without overlapping,
The screen of limited size can be effectively used.
Further, when a map operation such as scrolling is performed, if the wide area map and the enlarged map are simultaneously scrolled, a screen switching operation or the like can be omitted and the operation can be facilitated.

In the present embodiment, the enlarged map is generated by enlarging the read map data. However, the present invention is not limited to this. You may make it read out the map data with a different scale factor, and generate an enlarged map based on this. Further, in the present embodiment, the enlarged map centering on the user's position is always displayed in the wide area map, but the present invention is not limited to this, and the wide area map is displayed when requested by the user. Alternatively, an enlarged map centering on its own position may be displayed.

-Second Embodiment-In this embodiment, in addition to the configuration of the first embodiment, coordinate conversion processing of map data is performed so that an area between the wide area map and the enlarged map can also be displayed. It is a thing. In the present embodiment, the same parts as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

FIG. 6 shows the flow of processing for coordinate conversion of map data, FIG. 7A shows the coordinates in the map data before coordinate conversion, and FIG. 7B shows the coordinates in the map data after coordinate conversion. To
Shown respectively. Note that in FIG. 7A, the area within the radius r _i centering on its own position is the area a and the radius r _i
Beyond radius r _o within the region area b, and the range exceeding the radius r _o and area c. The coordinates in area a are P _i (x _i , y _i ), and the coordinates in area b are P _m (x _m ,
y _m ), the coordinates in area c are indicated by P _o (x _o , y _o ). On the other hand, in FIG. 7 (b), the current position radius R _i within the area an area A around the radius R _i of greater than radius R _o
The area within the area is area B, and the area exceeding the radius R _o is area C. The coordinates in area A are Q _i (X _i , Y
_i ), the coordinates in area B are indicated by Q _m (X _m , Y _m ), and the coordinates in area C are indicated by Q _o (X _o , Y _o ).

In this process, first, a new coordinate P (x, y) from the map data acquired from the recording disk is used.
Is selected (step S201). Then, it is determined whether or not the selected coordinates are within the area a (step S202). Here, when the selected coordinate exists in the area a, the coordinate conversion is performed by the coordinate conversion calculation 1 described above to obtain the enlarged converted coordinate Q _i (X _i , Y _i ) (step S203).

On the other hand, if the selected coordinate does not exist in the area a, then it is judged whether or not the selected coordinate exists in the area b (step S204). here,
If the selected region exists in the area b, coordinate conversion is performed by the coordinate conversion calculation 2 shown below to obtain the compressed conversion coordinates Q _m (X _m , Y _m ) (step S205).

[0030]

[Equation 2]

If the selected coordinate does not exist in the area b (if it exists in the coordinate area c), this coordinate is obtained as the non-converted coordinate Q _o (X _o , Y _o ) in step S203. The enlarged conversion coordinates Q _i (X _i , Y _i ) thus obtained and the compression conversion coordinates Q _m (X _m ,
Y _m ) and store it in the main memory (step S20).
6). Then, if the selection for all areas of the map data is not completed, the process returns to step S201 and the above-described process is repeated. On the other hand, when the selection for all the areas of the map data is completed, this process ends (step S207).

As a result, the map data shown in FIG. 7 (a) is rewritten into the display map data shown in FIG. 7 (b). That is, the area a of the original map data is enlarged converted to area A of the radius R _i, area b of the original map data is compressed to the area B of radius R _o from a radius R _i, is not enlarged converted Area It will be surrounded by C.

FIG. 8 (a) shows an example of the map data 70 before coordinate conversion corresponding to FIG. 7 (a). here,
The map data 70 includes a plurality of roads 71a that are orthogonal to each other.
~ 71i and roads 72a to 72i are displayed. Further, a pointer 73 indicating the current position and the traveling direction is shown in the center of the figure. On the other hand, FIG.
Shows the map data 80 corresponding to FIG. 7B and obtained after coordinate conversion of FIG. 8A. A pointer 74 indicating the current position and the traveling direction is displayed in the center of the figure. In the present embodiment, the above-mentioned coordinate conversion is performed to expand the circular area a covering the periphery of the current position shown in FIG. 8A to the area d indicated by the broken line in the figure, and the area b to the area d. And the outer peripheral edge of the area b is compressed into a region shown in FIG.
It is possible to obtain a composite map in which area B (connection map) is formed between area C (wide area map) and area A (enlarged map) shown in (b). In this example, in area A,
The vicinity of the intersection of the road 71e and the road 72e corresponding to the current position is enlarged and displayed, and landmarks and the like existing near this intersection are also displayed at the same time. Further, in the area B, the roads 71c to 71g and the roads 72c to 72g, which are distorted in shape, are also displayed, and the continuity of the roads can be confirmed.

In the present embodiment, the operation by the user is
Therefore, you can specify the magnification of the enlarged map.
Therefore, the formation area of area B is changed according to the specified enlargement ratio.
It is supposed to be changed. In FIG. 9A, an example
For example radius r_iArea a of the radius R shown in FIG.
_i1(Radius r_i1.5 times),
Radius r shown in FIG. 9 (a)_o1Area b₁As area b
Coordinate conversion is performed and the radius R shown in FIG._i1Area A
₁, Radius R_i1To R_o1Area B₁, Other area C₁
To get Further, in FIG. 9A, for example, the radius r_iD
The radius R of the rear a is shown in FIG. 9 (c)._i2(Radius r_iOf 2.5
In the case of enlarging to double), the radius shown in FIG.
r_o2Area b₁+ B₂Coordinate conversion with area b as
Radius R shown in FIG. 9 (c) _i2Area A₂, Radius R_o2D
Rear B₂, Other area C₂To get Thus, Eri
As the enlargement ratio from a to a is increased,
Area B radial length difference (R_o1-R_i1, R_o2−
R_i2), The route displayed in area B
It is possible to prevent the congestion of
The connection can be easily understood.

In the present embodiment, the area a and the area A obtained by enlarging the area a have a circular shape, but it may be selected from an appropriate shape. FIG. 10A shows another example of the map data 70 before coordinate conversion. Here, it is assumed that a plurality of roads 71a to 71i and roads 72a to 72i are displayed so as to be orthogonal to each other in the map data 70, as in the second embodiment. Also, in the center of the figure,
A pointer 73 indicating the current position and the traveling direction is shown. On the other hand, FIG. 10B shows the map data 80 after coordinate conversion obtained by coordinate conversion of FIG. 10A. A pointer 74 indicating the current position and the traveling direction is displayed in the center of the figure.

In this way, the square area a covering the periphery of the current position shown in FIG. 10A is enlarged to the area d indicated by the broken line in the figure, and the area b is divided into the area d and the outer peripheral edge of the area b. By compressing into the region between FIG.
It is possible to obtain a composite map in which area B (connection map) is formed between area C (wide area map) and area A (enlarged map) shown in (b). In this example, as in the case described above, the road 71e corresponding to the current position in the area A is displayed.
And the vicinity of the intersection of the road 72e is enlarged and displayed, and landmarks and the like existing near the intersection are also displayed at the same time. Further, in the area B, the roads 71c to 71g and the roads 72c to 72g, which are distorted in shape, are also displayed, and the continuity of the roads can be confirmed.

Further, as shown in the above embodiment, it corresponds to a program for performing a process of displaying an enlarged map including the current position on a portion corresponding to the current position in the wide area map on a screen, and a predetermined area in the wide area map. The program for displaying a magnified map including a predetermined area on the selected area may be in the form of the following storage medium or program transmission device.
That is, as the storage medium, the above-described program may be stored in a storage medium such as a CD-ROM, a DVD, various memories including semiconductors, a hard disk, or the like so that a computer device such as a navigation device can read it. Further, as the program transmission device, storage means such as a CD-ROM, a DVD, various memories including a semiconductor, a hard disk, etc. in which the above-mentioned program is stored, and the program is read from the storage means and the program is executed. The device side may be configured to include a connector or a transmission unit that transmits the program via a network such as the Internet or a LAN. Such a program transmission device is suitable for installing a program that performs the above-described processing in a navigation device or the like.

[0038]

As described above, according to the present invention,
It is possible to provide a navigation device, a map display device, and the like for which the user can easily obtain information visually.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a navigation device according to a first embodiment.

FIG. 2 is a flowchart of a map display process of the navigation device according to the first embodiment.

FIG. 3 is a flowchart of a coordinate conversion process of the navigation device according to the first embodiment.

FIG. 4A is an explanatory diagram showing coordinates in map data before coordinate conversion, and FIG. 4B is a diagram showing coordinates in map data after coordinate conversion.

5A is an explanatory diagram showing an example of map data before coordinate conversion, and FIG. 5B is an explanatory diagram showing an example of map data after coordinate conversion.

FIG. 6 is a flowchart of a coordinate conversion process of the navigation device according to the second embodiment.

FIG. 7A is an explanatory diagram showing coordinates in map data before coordinate conversion, and FIG. 7B is a diagram showing coordinates in map data after coordinate conversion.

FIG. 8A is an explanatory diagram showing an example of map data before coordinate conversion, and FIG. 8B is an explanatory diagram showing an example of map data after coordinate conversion.

9A to 9C are explanatory diagrams showing the relationship between the enlargement ratio of the enlarged map and the formation area of the connection map.

FIG. 10A is map data before coordinate conversion, and FIG.
FIG. 6 is an explanatory diagram showing another example of map data after coordinate conversion.

FIG. 11 is an explanatory diagram showing an example of a display screen of a conventional navigation device.

[Explanation of symbols]

1 ... Navigation device, 11 ... Speaker, 12 ... Operation part, 13 ... Communication terminal, 14 ... Disk drive, 15 ...
Display unit, 16 ... Positioning block, 17 ... Control block, 1
8 ... Traffic information receiving block, 21 ... GPS antenna, 2
2 ... GPS positioning unit, 23 ... Vehicle speed sensor, 24 ... Gyro sensor, 25 ... Positioning correction unit, 30 ... CPU, 31 ... RA
M, 32 ... ROM, 33 ... Voice control section, 34 ... Input control section, 35 ... Path setting control section, 36 ... Communication section, 37 ... Storage control section, 38 ... Display control section, 41 ... FM multiplex receiver, 4
2 ... Beacon receiver, 43 ... Traffic information processing control unit

Continued front page    (72) Inventor Tadashi Yokoyama             6-735 Kita-Shinagawa, Shinagawa-ku, Tokyo Soni             -Inside the corporation F term (reference) 2C032 HB22 HB23 HB25 HC08 HC24                       HC26 HD03                 2F029 AA02 AB01 AB07 AB13 AC02                       AC09 AC14 AC16 AD08                 5B050 AA06 AA08 BA06 BA17 CA07                       CA08 EA12 EA19 FA02 FA10                       FA13 FA14 FA19                 5H180 AA01 BB02 BB04 BB05 BB13                       CC12 EE18 FF04 FF05 FF12                       FF13 FF22 FF27 FF35

Claims (9)

[Claims] 1. A wide area map based on the map data for a positioning means for positioning the current position, a map data acquisition means for acquiring map data, and an area to be displayed including the current position cut out from the map data. And a magnified map including the current position and magnified from the wide area map, the display map in which the current position in the magnified map is overlaid on a portion corresponding to the current position in the wide area map. A navigation device comprising: a display map data generation unit that generates data; and a display unit that displays a map based on the display map data. 2. The display map data generating means includes a connection map obtained by processing the map data so that the map information of the enlarged map periphery and the map information of the wide area map are connected. The navigation device according to claim 1, wherein the navigation device generates data. 3. The navigation device according to claim 2, wherein the enlargement ratio of the enlarged map and the formation region of the connection map are associated with each other. 4. The navigation device according to claim 2, wherein the map information is information about a route. 5. A map data acquisition unit for acquiring map data, a region cut out from the map data to be displayed, and a wide area map based on the map data, and an enlarged map obtained by enlarging a predetermined region in the wide area map. And a connection map obtained by processing the map data so that the map information of the inner edge of the wide area map and the map information of the outer edge of the enlarged map are connected to each other. And a display map data generating unit for generating display map data in which the enlarged map is superposed on the enlarged map, and the connection map is superposed between the wide area map and the enlarged map, and based on the display map data. And a display unit for displaying a map. 6. A step of detecting a current position, a step of generating a wide area map including the current position, a step of generating an enlarged map in which a predetermined area including the current position in the wide area map is enlarged, And a step of superimposing and displaying the current position of the enlarged map on a site corresponding to the current position in the wide area map. 7. A step of generating a wide area map, a step of generating an enlarged map in which a predetermined area in the wide area map is enlarged, and a connection map connecting the periphery of the enlarged map and the wide area map, And a step of superimposing and displaying the enlarged map and the connection map on a portion corresponding to the predetermined area in the map display method. 8. A function of causing a computer to read map data and generate a wide area map including a current position, a function of generating an enlarged map in which a predetermined area including the current position in the wide area map is enlarged, and the wide area A program that realizes a function of superimposing and displaying the current position of the enlarged map on a portion corresponding to the current position in the map. 9. A computer is provided with a function of reading map data and generating a wide area map, an enlarged map in which a predetermined area in the wide area map is enlarged, and a connection map connecting the periphery of the enlarged map and the wide area map. A program that realizes a function of generating and a function of superimposing and displaying the enlarged map and the connection map at a site corresponding to the predetermined region in the wide area map.