JPH09305104A - Map display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a map display device capable of discriminating not only roads between blocks but also roads within the blocks in a visually comprehensive form. SOLUTION: When a desired place is specified by an input device 2, a control device 4 specifies a map data and fetches map data classified by shapes of block and alloy from a storage device 3 and controls the display order according to the classification of the map data, therefore, not only roads between blocks but also roads within the blocks can be displayed on a display device 1 in a visually comprehensive form.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic map display device for handling a map shape as vector data, including a navigation device, and particularly to roads existing between blocks and roads existing in blocks. The present invention relates to an electronic map device that can be visually and easily discriminated.

[0002]

2. Description of the Related Art In recent years, a map display device including a navigation device is required to have a detailed map, and a road map which is smaller than 1 / 10,000 and has a line width in a road shape is required.

Conventionally, a map display device which has a line width in the shape of a road, which is finer than 1 / 10,000, is disclosed in Japanese Patent Laid-Open No.
The one described in No. 59624 is known.

This conventional electronic map device is provided with block shape data which is characterized in that when there is a road between blocks, the shape is always represented by the same line as the edge line of the road. FIG. 14 shows an image diagram of a display screen when the character information data of the conventional electronic map device is omitted.

[0005]

However, in the conventional electronic map device described above, the road existing between the blocks can be visually identified from the block shape data.
There is a problem that roads existing in the block cannot be visually identified. The present invention is to solve the above-mentioned conventional problems, and to provide an excellent map display device capable of visually recognizing both roads existing between blocks and roads existing in blocks. To aim.

[0006]

In order to solve the above problems, the invention according to claim 1 of the present invention specifies a storage device for storing map data, a display device for displaying map data, and map data. An input device and a control device for extracting the map data designated by the input device from the storage device and displaying the map data on the display device are provided, and as the map data, one shape is provided for each block of the address, and between the blocks. Whenever there is a road, the block shape data is characterized in that it represents the shape on the same line as the edge line of the road, and the road in the block connected to the road existing between the blocks And the alley shape data, which has a shape protruding toward the outside of the block.

In order to solve the above-mentioned problems, the invention according to claim 2 of the present invention comprises a storage device for storing map data, a display device for displaying the map data, and an input device for designating the map data, The map data specified by the input device is extracted from the storage device and is displayed on a display device. The map data includes the block shape data according to claim 1 and roads existing between the blocks. Roads in unconnected blocks are provided with alley shape data, which is characterized in that the lines of the block shape are stopped in front of the inside of the block.

In order to solve the above-mentioned problem, the invention according to claim 3 of the present invention comprises a storage device for storing map data, a display device for displaying the map data, and an input device for designating the map data, The map data specified by the input device is extracted from the storage device and is displayed on the display device. The map data is the block shape data according to claim 1, and the shape of the bridge or tunnel is the shape of the bridge. The other shape data to represent and the road in the block passing under the road of one or more city sections should be the same shape as the line of the other shape data expressed as the shape of the bridge. And the alley shape data.

In order to solve the above-mentioned problem, the invention according to claim 4 of the present invention comprises a storage device for storing map data, a display device for displaying the map data, and an input device for designating the map data, The map data specified by the input device is extracted from the storage device, and is provided with a control device for displaying it on the display device. As the map data, the block shape data according to claim 1 and the bridge shape according to claim 3 are provided. Roads in multiple blocks that are connected to other shape data that is represented by bridges that cross over one or more roads in one block
And alley shape data, which is characterized by having one shape.

In order to solve the above-mentioned problems, the invention according to claim 5 of the present invention comprises a storage device for storing map data, a display device for displaying the map data, and an input device for designating the map data, The map data specified by the input device is extracted from the storage device, and is provided with a control device for displaying it on the display device. As the map data, the block shape data according to claim 1 and the bridge shape according to claim 3 are provided. The other shape data that represents and the roads within the block that are connected to the roads that exist between the blocks are set so that the line of the block shape extends toward the outside of the block, and further between the blocks. The roads in the block that are not connected to existing roads are shaped so that the line of the block shape is stopped in front of the inside of the block, and the roads in the block that pass under the road of one or more block The shape of the bridge is the same shape as the other shape data lines, and the roads in multiple blocks connected by a bridge that crosses one or more roads in the block It is provided with alley shape data characterized by one shape.

As described above, it is possible to obtain an excellent electronic map device capable of visually distinguishing roads existing between blocks and blocks existing in blocks.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present invention comprises a storage device for storing map data, a display device for displaying map data, and an input device for designating map data.
In the case where the map data designated by the input device is extracted from the storage device and is displayed on the display device, the map data has one shape for each block of the address, and there is a road between the blocks. Is characterized by the same line as the edge line of the road, the block shape data and the roads in the block connected to the road existing between the blocks, and the block shape line The map display device is provided with the alley shape data, which has a shape protruding toward the outside, and the road existing between the blocks and the roads within the block are connected. It has an effect that a part can be displayed as if the road existing between the blocks and the road in the block are connected.

The invention according to claim 2 of the present invention is a storage device for storing map data, a display device for displaying map data, an input device for designating map data, and map data designated by the input device. And a control device for extracting the data from the storage device and displaying it on the display device. When the map data has one shape for each block of the address and there is a road between the blocks, the same as the border line of the road. Block shape data, which is characterized by expressing the shape with lines, and roads in blocks that are not connected to the roads that exist between blocks are set as shapes that stop the line of the block shape before the inside of the block. The present invention is a map display device including alley shape data, characterized in that a portion of a road that is not connected to a road existing between blocks and a road inside the block is located between the blocks. Road and city It has the effect that the road can be displayed as not connected in the.

The invention according to claim 3 of the present invention is a storage device for storing map data, a display device for displaying map data, an input device for designating map data, and map data designated by the input device. And a control device for extracting the data from the storage device and displaying it on the display device. When the map data has one shape for each block of the address and there is a road between the blocks, the same as the border line of the road. Block shape data, which represents the shape as a line, and other shape data that represents the shape of the bridge or tunnel as the shape of the bridge, 1
Alley shape data, characterized in that a road in a block passing under one or a plurality of roads in a city section is formed on the same line as a line of other shape data represented as the shape of the bridge. And a map display device provided with, and displaying a portion of a road in a block that passes under a road in one or more city sections as if it passes under a road in a city section. It has the effect that

The invention according to claim 4 of the present invention is a storage device for storing map data, a display device for displaying map data, an input device for designating map data, and map data designated by the input device. And a control device for extracting the data from the storage device and displaying it on the display device. When the map data has one shape for each block of the address and there is a road between the blocks, the same as the border line of the road. Block shape data, which represents the shape as a line, and other shape data that represents the shape of the bridge or tunnel as the shape of the bridge, 1
A map display device having alley shape data, characterized in that roads in a plurality of blocks, which are connected by a bridge that crosses roads in one or a plurality of city sections, have one shape. There is an effect that it is possible to display roads in a plurality of blocks connected by a bridge existing over a plurality of blocks as if they are connected by a bridge that crosses over the roads in the blocks.

The invention according to claim 5 of the present invention is a storage device for storing map data, a display device for displaying map data, an input device for designating map data, and map data designated by the input device. And a control device for extracting the data from the storage device and displaying it on the display device. When the map data has one shape for each block of the address and there is a road between the blocks, the same as the border line of the road. Block shape data, which is characterized by a line, and other shape data that represents the shape of a bridge or tunnel as the shape of a bridge, and roads within a block that are connected to roads that exist between blocks. With the shape of the block shape protruding toward the outside of the block, and the road inside the block that is not connected to the road existing between the blocks and the line of the block shape in front of the inside of the block. When And a shape in which a road in a block passing under one or more roads in a city section is stopped on the same line as the other shape data line represented as the shape of the bridge, A map display device provided with alley shape data, characterized in that roads in a plurality of blocks connected by a bridge that crosses roads in one or a plurality of city sections have one shape It is possible to display the roads existing between the blocks and the roads connected to each other as if the roads existing between the blocks and the roads connected to each other are connected to each other. It is possible to display the part where the road existing between the blocks and the road in the block are not connected as if the road existing between the blocks and the road in the block are not connected,
A portion of a road within a block that passes under one or more roads in a block can be displayed as if it passes under a road in a block, and bridges that span multiple blocks can be displayed. It has an effect that roads in a plurality of connected blocks can be displayed as if they are connected by a bridge that crosses the roads in the block.

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

(First Embodiment) FIG. 1 shows a first embodiment of the present invention.
1 is a block diagram showing the configuration of the map display device according to the embodiment of the present invention. In FIG. 1, the display device 1 displays map data, and is composed of a CRT display, a liquid crystal display, or the like. The input device 2 is used to specify map data, and is composed of a keyboard, a joystick, a mouse, a trackball, or the like. The storage device 3 stores map data, and is composed of a semiconductor memory, an optical disk, a magnetic disk, or the like. The control device 4 extracts the map data designated by the input device 2 from the storage device 3 and controls the display device 1 to display the map data. The control device 4 is composed of a computer main body or a CPU, ROM and RAM of the navigation device. ing.

FIG. 2 shows the data structure of the map data stored in the storage device 3 shown in FIG. 1. In FIG.
The overall management information 31 indicates which area each of the map data 32 covers. The map data 32 is composed of a plurality of map data, each of which represents a map of an area having the same size as the display screen, and detailed management information 33, a block shape data block 34, an alley shape data block 35, and other It is composed of a shape data block 36 and other information data block 37.

The detailed management information 33 indicates the information for finding the map data and the information for finding the data of its own data block, and includes the map data number, the map data numbers of the eight surrounding map data, and the block. Each of the shape data block 34, the alley shape data block 35, the other shape data block 36, and the other information data block 37, from the start address of the data block number and the detailed management information to the start address of the data block It is composed of the difference and the size of the data block.

The block shape data block 34 indicates the shape of a plurality of blocks existing in the corresponding area, and is composed of a plurality of block shape data.

The alley shape data block 35 indicates the shape of a road in a plurality of blocks existing in the corresponding area, and is composed of a plurality of alley shape data.

The other information data block 36 indicates a plurality of other shapes such as a shape of a bridge or a tunnel, a shape of a building including a private house, etc. existing in the corresponding area. It is composed of information data.

The other information data block 37 indicates a plurality of other information other than the shape such as the shape of the road network and the character information existing in the corresponding area. It is configured.

FIG. 3 shows the block shape data which is a constituent element of the block shape data block 34 in FIG. 2, the alley shape data which is a constituent element of the alley shape data block 35, and the other shape data block 36. The data structure of other shape data which is a component is shown, and in FIG. 3, the coordinate number 3a shows the number of coordinates, and is comprised by one numerical value. The surface line type 3b indicates whether the shape data is surface data or line data, and is composed of one numerical value defined as 1 for a surface and 0 for a line. The coordinate data 3c indicates vector coordinates of the data, and is composed of a plurality of coordinate data, each of which is composed of a plurality of coordinate values (for example, binary values of X coordinate and Y coordinate). Only the coordinate data has an absolute coordinate value, and the other coordinate data has a difference value from the first coordinate data.

FIG. 4 shows an image showing how to obtain the coordinates of the block shape data and the alley shape data.
In, 34 is block shape data representing the shape of the block, and 35 is alley shape data representing the shape of the road in the block. In FIG. 4, black dots represent coordinate data.

For example, the block shape data 34c in FIG.
Has coordinate data of four points P1, P2, P3, and P4. Also,
The alley shape data 35c in FIG. 4 has coordinate data of eight points Q1 to Q8.

Block shape data 34 and alley shape data 35
Both define the surface line type as a surface.

Here, k1, k2, which are the parts where the roads in the block are connected to the roads existing between the blocks,
The k3 portion defines the coordinates of the alley shape data so that the line of the block shape data is in a shape protruding toward the outside of the block. That is, in the k1 part, the coordinates Q1, Q2 of the alley shape data are defined outside the block of the line segment P1-P2 of the block shape data, and similarly, in the k2 part, the coordinates Q6 of the alley shape data, Q7 is defined outside the block of the line segment P4-P1 of the block shape data, and at the part of k3, the coordinates Q3 of the alley shape data,
Q4 is defined outside the block of the line segment P3-P4 of the block shape data. The alley shape data 35b existing in the block shape data 34b is similarly defined.

The operation of the map display device configured as described above will be described with reference to FIG. First, when the place to be displayed is specified by the input device 2, the information specifying the point to be displayed is output from the input device 2 to the control device 4.

The control device 4 specifies the map data to be displayed from the information for specifying the point to be displayed received from the input device 2, and retrieves the map data to be displayed from the storage device 3.

The control device 4 selects from this map data
The display device 1 converts the data into a form that can be displayed and outputs the data to the display device 1. The display device 1 displays the data received from the control device 4.

As described above, the map display device displays the map of the designated area. According to the present invention, at the time of this display, the control device 4 controls the display device 1 for each map data block.
It is characterized by controlling the output order and display method.

The control device 4 first outputs to the display device 1 data for filling the entire display surface of the display device 1 with a default color (for example, white). Since the display screen is overwritten with the previous state, the display screen of the display device 1 is as shown in FIG.
The display state is as follows.

The control device 4 then displays the block shape data of the block shape data block 34, and the display device 1 displays the block shape surface with a color different from the default color (for example, light yellow green).
The data is output to the display device 1 after being converted into a form that can be displayed by filling in with. Since the display screen is overwritten with the previous state, the display screen of the display device 1 has the display state as shown in FIG.

The control device 4 then makes the alley shape data of the alley shape data block 35 into a form that the display device 1 can display so that the surface of this alley shape is filled with the same color as the default color (for example, white). The data is converted and output to the display device 1. Since the display screen is overwritten with the previous state, the display device 1 has the display state as shown in FIG. 7.

In this way, the roads existing between the blocks and the faces of the roads in the blocks are displayed in the default color (for example, white), and the faces of the blocks are different from the default color (for example, white). Since it is displayed in light yellow green, it has an effect that roads existing between the blocks and blocks within the block can be visually distinguished easily.

Further, since the roads in the blocks connected to the roads existing between the blocks are formed so that the line of the block shape is protruded toward the outside of the blocks, it exists between the blocks. It is possible to display a part where the road is connected to the road in the block as if the road existing between the blocks and the road in the block are connected to each other.

As described above, according to the first embodiment of the present invention, in the alley shape data representing the shape of the road in the block,
The alley shape data is constructed by defining the part connected to the road existing between the blocks as the shape of the block shape line protruding toward the outside of the block, and the map data is defined as the block shape data representing the shape of the block. , The alley shape data that represents the shape of the road in the block, and when displaying, first fill the entire display screen with the default color, then fill the block shape surface with a color different from the default color, and then alley shape By painting the surface with the same color as the default color, it is possible to easily distinguish visually the road in the city section and the road in the block connected to the road in the city section.

(Second Embodiment) FIG. 8 shows how to obtain the coordinates of the block shape data and the alley shape data in the same configuration as the first embodiment, as in FIG. Show the image.

Here, the k4 portion, where the roads in the block are not connected to the road existing between the blocks, has a shape in which the line of the block shape data is stopped in front of the inside of the block. Thus, the coordinates of the alley shape data are defined.
That is, at the portion k4, the coordinates Q6, Q7 of the alley shape data
Is defined inside the block of the line segment P4-P1 of the block shape data.

In the map display device thus constructed,
When operated in the same manner as in the first embodiment, the state of the display screen transits to that shown in FIGS. 5, 6 and 9. Therefore,
In addition to the operation of the first embodiment, the road in the block that is not connected to the road existing between the blocks has a shape in which the line of the block shape is stopped in front of the inside of the block. It is possible to display a part where the road existing between the block and the road in the block is not connected as if the road existing between the block and the road in the block is not connected.

As described above, according to the second embodiment of the present invention, in addition to the configuration of the first embodiment of the present invention, a block which is not connected to a road existing between blocks. By configuring the alley shape data as the shape of the road inside, the line of the block shape is stopped in front of the inside of the block,
In addition to the effect of the first embodiment of the present invention, it is possible to visually distinguish roads in a city section and roads in a block that are not connected to roads in a city section in an easily understandable manner.

(Third Embodiment) FIG. 10 shows the first embodiment.
The image which shows how to take the coordinate of the block shape data, the said alley shape data, and other information data in the structure similar to embodiment of this is shown.

Reference numeral 36 is other shape data representing the shape of the bridge or the tunnel. Similar to FIG. 4, the black dots represent the respective coordinate data.

For example, the other shape data 36a in FIG. 10 has coordinate data of 6 points R1 to R6. The shape of the bridge or the tunnel is defined as other shape data having coordinate data of 6 points in the shape of the bridge, such as 36a.

The other shape data 36 represented as the shape of the bridge defines the surface line type as a line. The other shape data 36b represented as the shape of the bridge existing in the block shape data 34b is similarly defined.

Here, a shape in which a road in a block passes a portion of k5 that passes under one or more roads in a city section on the same line as a line of other shape data expressed as a shape of a bridge The coordinates of the alley shape data are defined as follows.
That is, at the portion of k5, the coordinates Q6, Q7 of the alley shape data
Is defined at the same point as the coordinates R3 and R4 of the other shape data. Alley shape data existing in the block shape data 34b
35b is also the other shape data expressed as the shape of the bridge 36
Similarly define for b.

The map display device configured as described above is operated in the same manner as in the first embodiment, and further, after displaying the alley shape data, the other shape data is displayed as the block shape data and the alley shape. When the display screen is overwritten similarly to the data, the state of the display screen transits to that shown in FIGS. 5, 6, 7, and 11.

Therefore, since the road in the block passing under the road of one or a plurality of city sections is formed on the same line as the line of the other shape data expressed as the shape of the bridge, In addition to the operation of the first embodiment, a portion of the road in the block passing under the road in one or more city sections can be displayed as if passing under the road in the city section. Has the effect of.

As described above, according to the third embodiment of the present invention, in addition to the configuration of the first embodiment of the present invention, a block passing under the road of one or a plurality of city sections. In addition to the operation of the first embodiment of the present invention, in addition to the operation of the first embodiment of the present invention,
After the display of alley shape data, the display of other shape data is overwritten and displayed in the same manner as the block shape data and the alley shape data, so that the road in the city section is also below the road in one or more city sections. The roads in the block passing through can also be distinguished visually in an easy-to-understand manner.

(Fourth Embodiment) FIG. 12 shows the first embodiment.
The image which shows how to take the coordinate of the block shape data, the said alley shape data, and other information data in the structure similar to embodiment of this is shown.

Here, the roads in the block are connected to each other by connecting the k6 portions that cross over the roads in one or a plurality of city sections, and the roads in the plurality of blocks connected by a bridge are formed into one shape. Define to. That is, in the part of k6, two blocks 34b,
The alley shape data existing in 34c are connected and defined as one alley shape data.

When the map display device configured as described above is operated in the same manner as in the third embodiment, the state of the display screen transits to that shown in FIGS. 5, 6, 7, and 13.

Therefore, since the roads in the plurality of blocks connected by the bridge existing over the plurality of blocks have one shape, in addition to the operation of the first embodiment,
It has an effect that roads in a plurality of blocks connected by bridges existing over a plurality of blocks can be displayed as if they are connected by a bridge that crosses over the roads in the block.

As described above, according to the fourth embodiment of the present invention, in addition to the structure of the first embodiment of the present invention, a plurality of bridges existing over a plurality of blocks are connected. By constructing the alley shape data for the roads in the block as one shape and operating the same as the operation of the third embodiment of the present invention, the effect of the first embodiment of the present invention can be obtained. In addition, it is possible to make a visually easy-to-understand determination as if roads in a plurality of blocks connected by bridges that span a plurality of blocks are connected by bridges that cross over roads in the block.

In the above description, the operation of reading one map data from the storage device is explained. However, the map data around the specified map data is read, and the map of the display screen is displayed by the scroll instruction from the input device. By shifting the data by the scroll amount and filling in the part that can no longer be displayed with the default color as in the previous operation, the corresponding surrounding map data is then sequentially overwritten and displayed. The same can be applied to the scroll of.

When it is desired to scroll quickly, the control device 4 is controlled so that the alley shape data 34 is not read when the map data is read from the storage device 3, or the data to the display device 1 is read. It is also possible to increase the display speed of the map by adding a control that does not convert the alley shape data 34 into a form that can be displayed by the display device 1 at the time of outputting.

Further, in the above description, the coordinate data of the map data is described as two coordinates of X and Y, but it is also the same that three-dimensional coordinate data is added and three-dimensional map display is performed. Can be implemented in

[0060]

As described above, the present invention has a storage device for storing map data, a display device for displaying map data, an input device for designating map data, and a storage device for storing map data designated by the input device. In a map display device equipped with a control device for extracting from a block and displaying it on a display device, if the map data has one shape for each block of the address and there is a road between the blocks, the border line of the road must be drawn. The block shape data and the roads within the block that are connected to the roads existing between the blocks are characterized by expressing the shape on the same line as By devising the method of taking the coordinates of the alley shape data, such as making it into a shape, and controlling the display of the control device according to the type of data, the road existing between the blocks can also be
It is also possible to obtain an effect that roads existing in the block can be distinguished visually easily.

[Brief description of drawings]

FIG. 1 is a configuration block diagram of a map display device according to a first embodiment of the present invention,

FIG. 2 is a diagram showing a data structure of map data according to the first embodiment of the present invention,

FIG. 3 is a diagram showing a data structure of city block shape data, alley shape data, and other shape data according to the first embodiment of the present invention;

FIG. 4 is an image diagram of map data according to the first embodiment of the present invention,

FIG. 5 is an image diagram (1) of a display screen according to the first embodiment of the present invention,

FIG. 6 is an image diagram (2) of a display screen according to the first embodiment of the present invention,

FIG. 7 is an image diagram (3) of a display screen according to the first embodiment of the present invention,

FIG. 8 is an image diagram of map data according to the second embodiment of the present invention,

FIG. 9 is an image diagram of a display screen according to the second embodiment of the present invention,

FIG. 10 is an image diagram of map data according to the third embodiment of the present invention,

FIG. 11 is an image diagram of a display screen according to the third embodiment of the present invention,

FIG. 12 is an image diagram of map data according to the fourth embodiment of the present invention,

FIG. 13 is an image diagram of a display screen according to the fourth embodiment of the present invention,

FIG. 14 is an image diagram of a display screen of a conventional map display device.

[Explanation of symbols]

 1 display device 2 input device 3 storage device 4 control device 31 general management information 32 map data 33 detailed management information 34 block shape data 35 alley shape data 36 other shape data 37 other information data k part of end of alley shape data P Coordinates of block shape data Q Coordinates of alley shape data R Coordinates of other shape data represented as bridge shape

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location G09G 5/36 510 G06F 15/62 335

Claims (5)

[Claims] 1. A storage device for storing map data, a display device for displaying map data, an input device for designating map data, and the map data designated by the input device is extracted from the storage device and displayed on the display device. It is characterized by including a control device, and as map data, one shape is used for each block of an address, and if there is a road between blocks, the shape is always represented by the same line as the edge line of the road. The block shape data and the alley shape data, which is characterized in that the roads within the block that are connected to the roads existing between the blocks are the shapes in which the line of the block shape is protruded toward the outside of the block, A map display device comprising: 2. A storage device for storing map data, a display device for displaying map data, an input device for designating map data, and map data designated by the input device is extracted from the storage device and displayed on the display device. It is characterized by including a control device, and as map data, one shape is used for each block of an address, and if there is a road between blocks, the shape is always represented by the same line as the edge line of the road. The block shape data and the alley shape data, which is characterized in that the roads in the blocks that are not connected to the roads existing between the blocks are shaped so that the line of the block shape is stopped in front of the inside of the block. A map display device having. 3. A storage device for storing map data, a display device for displaying map data, an input device for designating map data, and map data designated by the input device is extracted from the storage device and displayed on the display device. It is characterized by including a control device, and as map data, one shape is used for each block of an address, and if there is a road between blocks, the shape is always represented by the same line as the edge line of the road. Block shape data, other shape data that represents the shape of a bridge or tunnel as a bridge shape, and roads in a block that pass under one or more road sections are represented as the shape of the bridge. A map display device, comprising: alley shape data, which is characterized by a shape that is cut on the same line as the shape data line. 4. A storage device for storing map data, a display device for displaying map data, an input device for designating map data, and map data designated by the input device is extracted from the storage device and displayed on the display device. It is characterized by including a control device, and as map data, one shape is used for each block of an address, and if there is a road between blocks, the shape is always represented by the same line as the edge line of the road. Block shape data and other shape data that represent the shape of a bridge or tunnel as a bridge shape, and a road in multiple blocks that is connected by a bridge that crosses over roads in one or more block A map display device comprising: alley shape data characterized by a shape. 5. A storage device for storing map data, a display device for displaying map data, an input device for designating map data, and map data designated by the input device is extracted from the storage device and displayed on the display device. It is characterized by including a control device, and as map data, one shape is used for each block of an address, and if there is a road between blocks, the shape is always represented by the same line as the edge line of the road. Block shape data, other shape data that represents the shape of a bridge or tunnel as a bridge shape, and roads inside the block that are connected to the roads that exist between the blocks, and the line of the block shape to the outside of the block. It has a shape that protrudes toward the outside, and that the road in the block that is not connected to the road existing between the blocks is a shape that stops the line of the block shape in front of the inside of the block. Or, the road in the block passing under the road of a plurality of city sections is formed into a shape that is collinear with the line of the other shape data represented as the shape of the bridge, and further, one or more city sections. A map display device comprising: alley shape data, characterized in that a road in a plurality of blocks, which is connected by a bridge crossing over the above road, has one shape.