JPH09237332A - Map displaying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To generally and widely display a local area and to display a customer's name for each frame of a house on a map in the business dealing with a customer through the use of a map system. SOLUTION: This method is provided with a minimum displaying range displaying magnification calculating part 11 for calculating the displaying magnification of the map from the characteristic 44 of a display 5, the resolution and the reduction scale 41 of map data to be a displaying object and a minimum displaying range 42 batch- displayed in one picture, and a displaying magnification calculating part for displaying the name of a house 12 calculating the displaying magnification of an image from the characteristic 44 of the display 5, the resolution and the reduction scale 41 of map data to be the displaying object, a character arranging parameter 45 necessary for discriminating a character on the picture and the characteristic of a house frame on the map. Then based on the displaying magnification of a standard map obtained from the displaying magnification of the map obtained from the displaying magnification calculating part 11 and the displaying magnification calculating part 12, an original map image 50 is magnified and reduced, then is stored as a standard map image 60, and when the standard displaying magnification is specified at the time of displaying the map, the standard map image 60 is displayed on a display.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for displaying an image map, and more particularly to a map display method for facilitating the interpretation of the situation of the surrounding area on the map and the character display in the house frame on the map.

[0002]

2. Description of the Related Art The map system is used for grasping statistical information over a wide range, for connecting roads such as road navigation, for looking at a target object, or for using a residential map. Like if you
There are cases where you want to know the individual house. In these systems, the scale for displaying the map is set each time the user gives an instruction.

[0003]

SUMMARY OF THE INVENTION The present invention is intended for the use of a map system in which the customer's position needs to be grasped when dealing with the customer by telephone. These services include, for example, telephone offices, electric power companies, fire departments, police, real estate, and the like. In the above-mentioned business, in response to an inquiry from a customer by telephone or the like, the customer's position is confirmed through the map system, and the customer information of the customer is grasped from the position on the map system to deal with the customer. In these customer service operations, information such as an address indicating the customer's position is often unclear, and the area around the relevant area is widely displayed to identify the customer's position with the placement of target objects such as large roads, hospitals, and libraries. It is important to know. However, a map system using an image map holds an original image with a high image quality (for example, a resolution of about 400 dpi) input by a scanner to display a detailed map, whereas the current display device Due to the characteristics, the resolution is limited to about 100 dpi.
As shown in 2, when the original image read by the scanner is displayed on the screen 51 of the display device 5 as it is, only a narrow range can be displayed. Therefore, in order to display the screen in an appropriate size when using the system, it is necessary to reduce the size of the original image and display it. This requires time for the reduction process of the original image, which slows down the screen display. There are challenges.

In addition, as shown in FIG. 33, when the original image is reduced to display the area around the area and at the same time the customer is specified, it is also necessary to display the customer name for each house frame on the map. To grasp a wide range on the screen 51, it is necessary to reduce the display scale and display the map in a reduced size.
If the size is reduced too much, the characters become small as shown in FIG. 34, which makes it difficult to read the customer name. Under such contradictory conditions, it is difficult for the user to interactively select an appropriate display scale, which complicates the original customer service operation and hinders the operation.

In order to solve the above problems, the present invention provides a screen display of an appropriate display scale that makes it easy to read the house name while displaying the area around the area when dealing with customers using a map system. Aim to achieve at high speed.

[0006]

In order to solve the above problems, a map display method according to the present invention provides a screen size (number of pixels) of a display device, a resolution and a scale of image map data to be displayed, and a user. Calculates the display magnification of the image from the minimum display range that should be displayed collectively on the same screen,
The scale of the original map image is changed according to the display magnification to create a display image map, and the image map is displayed on the display device.

In the map display method according to the present invention, the resolution of the display device, the resolution and scale of the image data of the map to be displayed, and the character arrangement parameters necessary for distinguishing the characters on the screen (eg: Character size, character spacing)
Then, the display magnification of the image is calculated from the characteristics of the house frame on the target map, the scale of the original map screen is changed according to the display magnification to create the display image map, and the image map is displayed on the display device. I decided to do it.

According to the map display method of the present invention, the screen size (number of pixels) of the display device, the resolution and scale of the image map data to be displayed, and the minimum size that the user should collectively display on the same screen. The display magnification of the image is calculated from the display range, the resolution of the display device, the resolution and scale of the image data of the map to be displayed, and the character layout parameters (character size, Character spacing) and the characteristic of the house frame on the target map, calculate the display magnification of the image, obtain the standard map display magnification based on the display magnification of the image map obtained as a result of the calculation, and by the standard map magnification The scale of the original map image is changed to create an image map for display, and the image map is displayed on the display device.

According to the map display method of the present invention, the screen size (the number of pixels) of the display device, the resolution and scale of the image map data to be displayed, and the minimum size that the user should collectively display on the same screen. The display magnification of the image is calculated from the display range, the resolution of the display device, the resolution and scale of the image data of the map to be displayed, and the character layout parameters (character size, The display magnification of the image is calculated from the character spacing) and the characteristics of the house frame on the target map, the standard map display magnification is calculated based on the display magnification of these image maps, and the standard map display magnification is input from the scanner. If the original map image is scaled up and down, stored and stored as a standard map image, and the display magnification specified by the user at the time of map display is equal to the standard display magnification, To display the standard map image serial accumulation stored in the display device.

A map display method according to the present invention acquires a display magnification that a user wants to display, scales a map image according to the display magnification, and generates a map image for display.
A house frame table that holds the shape of the house frame to be displayed on the map, an attribute table that holds the characters to be drawn on the map corresponding to the house frame in the house frame table, and a house frame in the house frame table A link table relating the characters in the attribute table is read, and the characters in the attribute table are generated according to the display magnification obtained based on the shape data of the house frame obtained from the house frame table. It is drawn on the display map image generated in.

A map display method according to the present invention is a distributed type in which a map server holding an original map image read from a scanner and a plurality of map display systems displaying map images on the map server are connected via a network. In the map display environment, the original map image, the difference map image that is the difference between the original map image and the standard map image, or the combination of the standard map image and the difference map image is held on the map server, and the map display is performed. A standard map image obtained by reducing the original map image is held in the system, and when the original map image is required in the map display system, the difference map image is transferred from the map server.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The structure of a map display system to which the map display method according to the present invention is applied will be described below. The map display system to which the map display method according to the present invention is applied includes a standard map magnification setting unit 10, a standard map image generation unit 20, and a map display unit 30.

(1) Standard map scale setting unit 10 The standard map scale setting unit 10 has a minimum display range table indicating a range to be displayed on the screen of the display device 5 at once, a screen size of the display device 5 and the display device 5. Display characteristics table that holds the resolution of each, the house frame characteristics table that holds the characteristics of the house frame for each map, the house name arrangement table that shows the arrangement method of the house name, and the position of the original map image read by the scanner Set a standard map magnification by inputting a map management table that holds size, resolution, and scale. The standard map magnification setting unit 10 includes a minimum display range display magnification calculation unit 11
And a display magnification calculation unit 12 for house name placement and a standard map magnification determination unit 13. (A) Minimum display range display magnification calculation unit 11 The minimum display range display magnification calculation unit 11 sets the minimum display range of the minimum display range table, the display device screen size of the display device characteristic table, and the resolution and scale of the map management table. Input and calculate the upper limit value of the map display magnification required to display the minimum display range on the screen. (A) House name arrangement display magnification calculation unit 12 The house name arrangement display magnification calculation unit 12 determines the characteristics of the house frame (minimum character arrangement area size (detailed in the embodiment)) of the house frame characteristics table and the house. Enter the character size and character spacing of the name arrangement table, the resolution of the display device characteristic table, the resolution and scale of the map management table, and display the map display magnification required to place the house name in the house frame on the screen. Calculate the lower limit. (C) Standard map magnification determination unit 13 The map display magnification determination unit 13 inputs the display magnification of each map from the calculation results of the minimum display range display magnification calculation unit 11 and the house name placement display magnification calculation unit 12, Determine the standard map magnification. For the determination, the display magnification of the minimum display range display magnification calculation unit 11 is prioritized.

(2) Standard Map Image Generating Unit 20 The standard map image generating unit 20 calculates the original map image 50 according to the standard map magnification set by the standard map magnification setting unit 10.
A standard map image 60 having a standard map magnification is generated.

(3) Map display unit 30 The map display unit 30 acquires the display magnification at the time of display from the display magnification acquisition unit 70, and the display magnification is the standard map magnification setting unit 10
If it is equal to the standard map magnification obtained from the above, a standard map image is used to generate the map image in the map image memory 80. If the display magnification is different from the standard map magnification, the map image for display is selected from the original map image. It is generated in the map image memory 80.
The display map image generated in the map image memory 80 is
It is displayed by the display device 5. The map display unit 30 includes a display map image generation unit 31 and a house name drawing unit 32. (A) Display map image generation unit 31 When the display map image generation unit 31 acquires the display magnification from the display magnification acquisition unit 70 and this display magnification is equal to the standard map magnification obtained from the standard map magnification setting unit 10. Inputs a standard map image and outputs it to the map image memory 80. When the display magnification acquired from the display magnification acquisition unit 70 is different from the standard map magnification, the original map image is input, the display map image is generated based on the resolution and scale obtained from the map management table, and the map image memory is generated. Output to 80. (A) House name drawing unit 31 The house name drawing unit 31 draws a customer name as a house name on the map image of the map image memory 80 output by the display map image generating unit 31. A link table that holds the correspondence between the customer table that holds the name of the customer and the house frame that holds the shape of the house frame and the customer is input, and the house is displayed according to the display magnification obtained by the display magnification acquisition unit 70. The name is drawn on the map image memory 80.

According to the present invention, an appropriate enlargement / reduction ratio map image can be obtained in a customer service using an image map, and the display processing can be speeded up.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an outline of an embodiment of the present invention, showing a relation between a basic table and main processing units described below. The map display system according to the present invention includes a display device 5, a standard map magnification setting unit 10, a standard map image generation unit 20, a map display unit 30, an original map image storage unit 50, and a standard map image storage unit 60. And a standard magnification acquisition unit 70, a map image memory 80, and various table storage units 41 to 49.

The map management table storage unit 41 stores a map management table holding the position, size, resolution and scale of the original map image 50 read by the scanner. The minimum display range table 42 stores a minimum display range table indicating a range to be collectively displayed on the screen of the display device 5. The house frame characteristic table storage unit 43 stores a house frame characteristic table that holds the characteristic of the house frame for each map. The display device 5 is stored in the display device characteristic table storage section 44.
A display device characteristic table holding the screen size and the resolution of the display device 5 is stored. House name arrangement table storage 4
A house name arrangement table indicating an arrangement method of house names is stored in 5. The place name management table storage unit 46 stores a place name management table. The customer table storage unit 47 stores a customer table holding the names of customers.
The link table storage unit 48 stores a link table that holds a correspondence relationship between customers in the customer table and house frames in the house frame table. The house frame table storage unit 49 stores a house frame table that holds the shape of the house frame.

The structure of the map display system according to the present invention will be described below. 1. System Configuration FIG. 2 shows a system configuration of a computer that implements the present invention.
A map display system in which the method of the present invention is implemented is a CPU
1, an external storage device 2 for storing code information and image information, an input device 3 for inputting commands and data,
A memory 4 in which the programs and data of the present invention are stored,
The display devices 5 are connected to each other via a system bus 6.

2. Related Tables The configurations of various tables that hold related data will be described below with reference to FIGS.

(1) Map management table 41 The map is composed of a plurality of map data 9 as shown in FIG. These map data 9 are input by reading a map of each sheet with an image scanner.
In FIG. 3, a total of nine map data 9 from Yamazaki town to Shiozaki town are configured. These individual map data 9
The map management table 41 shown in FIG. The map management table 41 includes a map name 41-1, a map position 41-2, and a map size (width, height) 41-3.
And the resolution 41-4 of the scanner when the map data 9 is input as an image and the data of the map scale 41-5. The map position 41-2 is composed of (x, y) coordinates from the origin of the map as shown in FIG. For example, the location data for Nakamachi is [1700,120
0], the position data of Yamazaki-cho is [1000, 70
0]. Further, the individual map data 9 includes a house frame 91, a house name 92, a display position 93, as shown in FIG.
It has a height h and a width w. In this way, the map management table 41 manages the individual map data 9 read by the image scanner.

(2) Minimum display range table 42 The minimum display range is, as shown in FIG. 6, the minimum range that at least needs to be displayed on one screen 51 when the map system is used for customer search. Point to. In FIG. 6, a total of 9 sections in front, back, left and right centering on the target house are displayed on the screen. The minimum display range indicates the range desired to be displayed on the minimum screen 51 when the map is viewed in this way by a distance. Maps also include densely populated urban areas and suburban areas with relatively low population densities. In this way, the range to be collectively displayed on the screen varies depending on the density of the house. The minimum display range table 42 shown in FIG. 7 manages the minimum display range that differs depending on the region. In this embodiment, the map name 41-
Minimum display range 42-1 for each map data 9 distinguished by 1
Set. The minimum display range table 42 is the map name 41.
-1 and the minimum display range 42-1 when displaying the area of the map represented by this map name. This allows
The minimum display range of each individual map data 9 corresponding to the map name is managed.

(3) House frame table 49 As shown in FIG. 8, houses on the map 9 are distinguished by house frames 91. The house frame table 49 shown in FIG. 9 manages this house frame. House frame table 49 is house frame number 49-
1 and a house frame shape 49-2. Individual house frame 91
Is assigned a house frame number 49-1 and each house frame 9
The shape of 1 is represented by a closed figure shown by the distance from the map origin of each point constituting the house frame 91 as shown in FIG.
Thereby, the display of each house frame and the position of the house name in the house frame are determined.

(4) House frame characteristic table 43 As shown in FIG. 8, there are many house frames 91 on the map, but the size of each house frame is different. This house frame 91
To display the house name such as customer name in, as shown in Fig. 11,
A rectangular area 94 for arranging characters is required in the house frame.
At this time, the largest rectangular area in which characters can be arranged inscribed in the house frame is called a character arrangement area 94. The long side of this character arrangeable area is called the long side, and the short side is called the short side.

As shown in FIG. 8, since the size of the house frame 91 on the map is different, the size of the character arrangement area 94 is also different for each house frame. At this time, the minimum value of each of the long side and the short side of the character arrangement area 94 size of each map data 9 distinguished by the map name is set to the minimum character arrangement area size 43.
Called -1. For example, as shown in FIG. 12, the minimum character arrangement area size 43-1 of the map name “Nakamachi” is the house frame number 00200.
10m on the long side of 1 and 5m on the short side of house number 002002
Becomes At this time, the minimum character arrangement area size 43-1
Indicates that, for each map data 9, there is an area in which characters must be arranged at the size indicated by the short side and the long side of the smallest character arrangement area size 43-1 at the smallest. The house frame characteristic table 43 in FIG. 13 manages the minimum character arrangement area size for each map data 9. The house frame characteristic table 43 includes a map name 41-1 and a minimum character arrangement area size 43-1 for each map name. With the house frame characteristic table 43, the minimum map display magnification for arranging a house name in a house frame can be determined for each map data 9.

(5) Display Device Characteristic Table 44 The display device 5 has different screen sizes and pixel resolutions for each device. Since the number of pixels that can be displayed on one screen differs depending on the screen size of the display device, the display magnification of the map image for fitting the minimum display range on the screen also differs for each characteristic of the display device 5. In addition, it becomes necessary to change the character spacing and the character size when arranging the characters on the screen according to the resolution of the display device 5. The display device characteristic table 44 shown in FIG. 14 manages the characteristics of these display devices. The display device characteristic table 44 includes a display device screen size 44-1 and a resolution 44-2.
Display device screen size 44 of display device characteristic table 44-
The display magnification of the image is determined from 1, and the character size and the character spacing when the house name is arranged are determined from the resolution.

(6) House Name Arrangement Table 45 In this embodiment, there are two types of character arrangements, vertically long and horizontally long. This example is shown in FIG. The rectangle necessary for arranging characters is called the character arrangement rectangle. In this embodiment, two characters of the customer name are displayed. FIG.
If you place 2 characters like 5 and between the characters,
There must be a space between the text layout rectangle and the text. This space is called a character space. The vertical and horizontal sizes of characters are referred to as character sizes, and in this embodiment, the vertical and horizontal sizes are set to the same size. From the character size, the number of characters, and the character spacing, the lengths of the short side and the long side of the character arrangement rectangle required for character arrangement are obtained as shown in (Equation 1) and (Equation 2) below.

[0028]

[Equation 1] (Equation 2) shows a case where characters are arranged in one line. For the operator to read the characters on the screen, there is a minimum required character size and character spacing depending on the resolution of the display device. For example, when the resolution of the display device is small, the character size and the character spacing are increased. Parameters for house name layout (character size, character spacing) according to the resolution of the display device
The house name arrangement table 45 shown in FIG. The house name arrangement table 45 has a character size 45-1,
It is composed of a character spacing 45-2 and a display device resolution 45-3. This realizes an appropriate character arrangement for each display device resolution.

(7) Place name management table 46 When the map display system is used for dealing with customers, the corresponding map is displayed on the screen using the place name as a search key. On this occasion,
It is necessary to manage the display position that should be displayed corresponding to the place name. The place name management table 46 shown in FIG. 17 manages the place name and the display position of the map at the time of this search. The place name management table 46 includes a place name 46-1 and a map display position 46-2 at the time of searching the place name. As a result, the corresponding position is displayed on the map when searching by place name.

(8) Customer table 47 In order to display the customer name on the house frame on the map, the customer name is required. The customer table 47 shown in FIG. 18 manages this customer name. The customer table 47 has a customer number 47-1 and a customer name 47-2, which are unique identifiers for each customer.
It is composed of The customer name 47-2 is further separated into a family name and a given name. Only the surname is used for the display on the map. Thereby, the house name to be displayed in the house frame on the map can be obtained.

(9) Link Table 48 In order to display the customer name on the house frame on the map, it is necessary to further manage which customer corresponds to which house frame. The link table 48 in FIG. 19 manages the correspondence between the customer name and the house quota. The link table 48 is composed of a customer number 47-1 of the customer table 47 to be associated with and a house frame number 49-1 of the house frame table 49. The customer number 47-1 and the house frame number 49-1 are associated with each other. Is stored. Thereby, the customer name corresponding to the house frame is managed, and the house name is arranged in the house frame.

4. System operation When operating this example, the interactive operation to the system is
It is divided into the following three. (1) Generation of standard map image A standard map image 60 is prepared as a system use preparation.
FIG. 20 shows an example of screen operation when creating a standard map. To generate the standard map image 60, the standard map creation button 55-1 of the maintenance menu is selected from the menu of the system screen displayed by pressing down the maintenance button 55. By this operation, the standard map image generation unit 20 is activated and the standard map image 60 is generated.

(2) Display magnification setting (a) When the display magnification is designated When the display magnification is arbitrarily designated, as shown in FIG.
Enlargement / reduction menus 54-1, 54-2 from the menu of the system screen displayed by pressing the enlargement / reduction button 54
The display magnification designation button 54-1 is selected, and the designated corpse display magnification is input in the display magnification input box 54-3.
Then, the display magnification input to the magnification acquisition unit 70 is set.

(B) When the standard map magnification is specified When the standard map magnification is applied to the display magnification, the standard map magnification 54-2 of the enlargement / reduction menu is selected from the menu of the system screen as shown in FIG. Then, the standard map magnification is set in the display magnification acquisition unit 70.

(3) Map search by search condition by place name To search and display a map by place name, as shown in FIG. 23, touch the search button 53 from the menu of the system screen to select the search menu, and further enter the search condition. Box 53-
Enter the place name you want to search in 1. Then the map display section 30
Starts up and a map of the area is displayed on the screen.

5. Processing Flow of Each Part The main processing flow of this embodiment is shown below. (1) Process of Standard Map Image Generating Unit 20 FIG. 24 shows a process flow of the standard map image generating unit 20.
First, the original map image 50 is input (S1). Next, the standard map magnification is acquired from the standard map magnification setting unit 10 (S
2). Further, the input original map image 50 is enlarged / reduced by the standard map magnification to generate the standard map image 60 (S3). Finally, the generated standard map image 60 is stored in the external storage device (S4).

(2) Process of Standard Map Scale Setting Unit 10 FIG. 25 shows a process flow of the standard map scale setting unit 10.
The upper limit value of the display magnification is acquired from the minimum display range display magnification calculation unit 11 (S11). Next, the lower limit value of the display magnification is acquired from the display magnification calculator 12 for arranging the house name (S12). The upper limit value and the lower limit value of the display magnification are input to the standard map magnification determination unit 13 to acquire the standard map magnification (S13). The standard map magnification setting unit 10 outputs this standard map magnification (S1).
4).

(A) Processing of the minimum display range display magnification calculation section 11 FIG. 26 shows a processing flow of the minimum display range display magnification calculation section 11. First, the minimum display range is acquired from the minimum display range table 42 (S21). Next, the display device screen size is acquired from the display device characteristic table 44 (S22). Further, the resolution and scale are acquired from the map management table 41 (S23). By using these parameters, the upper limit of the display magnification is calculated by the following (Formula 3), and is output (S2
4).

[0039]

[Equation 2]

(B) Process of the display magnification calculating section 12 for house name arrangement FIG. 27 shows a processing flow of the display magnification calculating section 12 for house name arrangement. First, the minimum character arrangement area size is acquired from the house frame characteristic table 43 (S31). Next, the resolution of the display device is acquired from the display device characteristic table 44 (S3).
2). Further, the resolution and scale are acquired from the map management table 41 (S33). Using these parameters, the lower limit of the display magnification is calculated according to (Equation 1), (Equation 2) and the following (Equation 4), and the result is output (S34).

(Equation 3)

(C) Processing of the standard map magnification determination unit 13 The standard map magnification determination unit 13 determines the standard map magnification from the upper and lower limits of the input display magnification as follows. (I) Upper limit value ≧ lower limit value The average value of the upper limit value and the lower limit value is taken as the standard map magnification. (Ii) Upper limit value ≤ lower limit value In this case, there is no display magnification that simultaneously satisfies the upper limit value and the lower limit value, so the display of the minimum map display range on the screen has priority and the upper limit value is the standard map magnification. .

(3) Process of Map Display Unit 30 FIG. 28 shows a process flow of the map display unit 30. First, the display position of the place name corresponding to the map search condition is acquired from the place name management table 46 (S41). Next, using the display map image generation unit 31, a map display map image corresponding to the display position of the place name is generated (S42). Further, the house name drawing unit 32 is used to draw the house name on the display map image generated in the map image memory 80 (S43). The map image thus drawn is displayed on the display device 5.

(A) Processing of the display map image generation unit 31 FIG. 29 shows a processing flow of the display map image generation unit 31. The display magnification is acquired from the display magnification acquisition unit 70 (S5
1), the standard map magnification is acquired from the standard map magnification setting unit 10 (S52). The display magnification thus acquired is compared with the standard map magnification (S53). When the display magnification is different from the standard map magnification, the original map image 50 is input (S54), the resolution and scale of the corresponding map are acquired from the map management table 40 (S55), and the original map image is enlarged and reduced and displayed. A map image corresponding to the magnification is generated (S56). The map image thus generated is output to the map image memory 80 (S57). If the display magnification is equal to the standard map magnification in step 53, the standard map image 60 is input (S5
8) The standard map image 60 is output to the map image memory 80 (S59).

(A) Processing of the house name drawing unit 32 FIG. 30 shows a processing flow of the house name drawing unit 32. The house frame shape and house frame number to be drawn are acquired from the house frame table 49 (S61). The customer number corresponding to the acquired house quota number is acquired from the link table 48 (S62). The customer name corresponding to the customer number acquired from the link table 48 is acquired from the customer table 47 (S64). The customer name corresponding to the house frame shape thus obtained is stored in the map image memory 80.
Is drawn (S65).

6. Expansion in distributed system In the above embodiment, the case where the map display system exists independently as a stand-alone as shown in FIG. 1 is configured. However, a plurality of map display systems form one map server. In the distributed environment sharing the above map, the expansion shown in FIG. 31 can be considered in order to reduce the transfer amount of image map data flowing on the network and realize high-speed display in the distributed map display system. In the above-mentioned embodiment for the stand-alone system shown in FIG. 1, the map display unit 30 reads the original map image 50 when the display magnification obtained from the display magnification acquisition unit 70 is different from the standard map magnification, A map image for display was generated.

On the other hand, when applied to a distributed system, the following points are expanded as shown in FIG. In the distributed system, a plurality of map display systems 100 are connected to a map server 200 via a network 66. The map server 200 has an original map image 50 and a standard map image 60, and creates a difference map image 65 thereof. Each map display system 100 has a standard map image 60.

(1) A standard map image 60 is held for each map display system 100 in order to speed up the map display on each map display system 100 and reduce the transfer amount of image map data on the network 66. .

(2) When the map display unit 30 needs the original map image 50, the original map image 50 and the standard map image 60 are transmitted from the map server 200 in order to reduce the transfer amount of the image map data on the network. Only the difference map image 65 is read into the map display system 100, and a display map image is generated and displayed from the standard map image 60 and the difference map image 65 in the map display system 100.

[0049]

The present invention has the following effects. (1) Based on the screen size of the display device and the resolution and scale of the image map data to be displayed, it is possible to always display on a screen the range of maps required for business at once.

(2) The resolution of the display device, the resolution and scale of the image map data to be displayed, and the character layout parameters (character size, character spacing, etc.) necessary for distinguishing characters on the screen and the target map. By obtaining the display magnification of the map necessary for reading the characters from the characteristics of the above house frame, it becomes possible to always display the map screen where the characters can be easily read.

(3) The upper limit value of the map display magnification for seeing on the screen the area that is desired to be displayed collectively in the business, which is more required for the screen size of the display device and the resolution and scale of the image map data to be displayed, The resolution of the display device and the resolution and scale of the image map data to be displayed,
Based on the character layout parameters (character size, character spacing, etc.) necessary to identify the characters on the screen and the characteristics of the target house frame on the map, the lower limit of the map display magnification required to read the characters By obtaining an appropriate map display magnification, it is possible to display a map suitable for customer service.

(4) The map images displayed in (1) and (2) above are accumulated and stored in advance and used at the time of display to realize batch display of the range necessary for business and easy character interpretation. It is possible to display the screen to be displayed at high speed.

(5) It is possible to display characters in an easy-to-see manner by sequentially determining the optimum character arrangement according to the display magnification required by the user and drawing the characters on the scaled map image.

(6) When applied to the distributed system, the standard map image is held in each map display system, and only the difference map image from the standard map image is transferred from the map server holding the original map through the network. As a result, a system with a small amount of data transferred on the network and high-speed display can be realized.

[Brief description of drawings]

FIG. 1 is a diagram showing an outline of the invention of a map display system to which a map display method according to the present invention is applied.

FIG. 2 is a configuration diagram of a map display system to which a map display method according to the present invention is applied.

FIG. 3 is a diagram showing a map management method of a map display method according to the present invention.

FIG. 4 is a diagram showing a configuration of a map management table used in the map display method according to the present invention.

FIG. 5 is a diagram illustrating map coordinates.

FIG. 6 is a diagram illustrating a minimum display range.

FIG. 7 is a diagram showing a configuration of a minimum display range table used in the map display method according to the present invention.

FIG. 8 is a diagram illustrating a house frame on a map.

FIG. 9 is a diagram showing a configuration of a house frame table used in the map display method according to the present invention.

FIG. 10 is a diagram illustrating a house frame shape.

FIG. 11 is a diagram illustrating a character arrangement area.

FIG. 12 is a diagram illustrating a minimum character arrangement area size.

FIG. 13 is a diagram showing a structure of a house frame characteristic table used in the map display method according to the present invention.

FIG. 14 is a diagram showing the configuration of a display device characteristic table used in the map display method according to the present invention.

FIG. 15 is a diagram illustrating character arrangement.

FIG. 16 is a diagram showing a configuration of a house name arrangement table used in the map display method according to the present invention.

FIG. 17 is a diagram showing the structure of a place name management table used in the map display method according to the present invention.

FIG. 18 is a diagram showing a configuration of a customer table used in the map display method according to the present invention.

FIG. 19 is a diagram showing a configuration of a link table used in the map display method according to the present invention.

FIG. 20 is a diagram showing an example of an operation screen when a standard map is created.

FIG. 21 is a diagram showing an example of an operation screen when a standard map magnification is designated.

FIG. 22 is a diagram showing an example of an operation screen when a display magnification is designated.

FIG. 23 is a diagram showing an example of an operation screen when inputting map search conditions.

FIG. 24 is a processing flowchart of a standard map image generation / creation unit.

FIG. 25 is a processing flowchart of a standard map magnification setting unit.

FIG. 26 is a processing flowchart of a minimum display range display magnification calculation unit.

FIG. 27 is a processing flowchart of a display magnification calculating unit for house name placement.

FIG. 28 is a processing flowchart of the map display unit.

FIG. 29 is a processing flowchart of the display map image generation unit.

FIG. 30 is a processing flowchart of a house name drawing unit.

FIG. 31 is a diagram illustrating an extended function when a distributed system is applied.

FIG. 32 is a diagram showing an example of a screen when an original image is displayed on a display device.

FIG. 33 is a diagram showing an example of a screen when the display magnification is appropriately set.

FIG. 34 is a diagram showing an example of a screen when the display magnification is too small.

[Explanation of symbols]

 1 central processing unit (CPU) 2 external storage device 3 input device 4 memory 5 display device 6 system bus 10 standard map magnification setting unit 20 standard map image generation unit 30 map display unit 50 original map image 60 standard map image 70 display magnification acquisition Part 80 Map image memory

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Nobuhiko Takayama 12 890 Kashimada, Saiwai-ku, Kawasaki-shi, Kanagawa 12 Hitachi, Ltd. Information Systems Division

Claims (6)

[Claims] 1. A map display method of a map display system for displaying an image map, wherein the screen size (number of pixels) of the display device, the resolution and scale of the image map data to be displayed, and the user within the same screen. For display, the original map image is scaled down according to the minimum display range display magnification calculation step for calculating the display magnification of the image from the minimum display range that should be displayed collectively, and the display magnification obtained in the minimum display range display magnification calculation step. A map display method, comprising: creating an image map and displaying the image map on a display device. 2. A map display method of a map display system for displaying an image map, which is necessary for discriminating characters on a screen, resolution of a display device, resolution and scale of image data of a map to be displayed. Character placement parameters (eg, character size, character spacing) and the display magnification of a house name for calculating the display magnification of the image from the characteristics of the target house frame on the map, and the display magnification for the house name display A map display method comprising a map display step of creating a display image map by changing the scale of the original map screen according to the display magnification obtained in the calculation step and displaying the image map on a display device. 3. A map display method of a map display system for displaying an image map, wherein the screen size (number of pixels) of the display device, the resolution and scale of the image map data to be displayed, and the user within the same screen. The minimum display range display magnification calculation step that calculates the image display magnification from the minimum display range that should be displayed all at once, the resolution of the display device, the resolution and scale of the image data of the map to be displayed, and the characters on the screen. Character display parameters (character size, character spacing) necessary for determining the character and the display magnification of the image for calculating the display magnification of the image from the characteristics of the house frame on the target map; A standard map display magnification is calculated based on the display magnification of the image map obtained in the display range display magnification calculation step and the house name display display magnification calculation step. A quasi-map magnification setting step, and a map display step of creating an image map for display by changing the scale of the original map image according to the standard map magnification obtained in the standard map magnification setting step, and displaying the image map on a display device. A map display device characterized by having. 4. A map display method of a map display system for displaying an image map, wherein the screen size (the number of pixels) of the display device, the resolution and scale of the image map data to be displayed, and the user within the same screen. The minimum display range display magnification calculation step that calculates the image display magnification from the minimum display range that should be displayed all at once, the resolution of the display device, the resolution and scale of the image data of the map to be displayed, and the characters on the screen. Character layout parameters (character size, character spacing) necessary to determine the display, and the display magnification calculation step for the house name display that calculates the display magnification of the image from the characteristics of the target house frame on the map, and the minimum display A standard map display magnification is calculated based on the image map display magnification obtained from the range display magnification calculation step and the house name display display magnification calculation step. Quasi-map magnification determination step, standard map image generation step of enlarging and reducing the original map image input from the scanner according to the standard display magnification, storing and storing as a standard map image, display magnification specified by the user at the time of map display And a map display step of displaying the stored and stored standard map image on a display device when the standard display magnification is equal to the standard display magnification. 5. A map display method of a map display system for displaying an image map, wherein a map image is enlarged according to a display magnification acquisition step for acquiring a display magnification desired by a user and a display magnification obtained in the display magnification acquisition step. A map image for display step of reducing and generating a map image for display, a house frame table that holds the shape of the house frame to be displayed on the map, and a house frame in the house frame table are displayed on the map corresponding to the house frame. An attribute table such as a customer table that holds characters to be drawn, such as a customer table, and a link table that associates the house frames in the house frame table with the characters in the attribute table are read and obtained from the house frame table. According to the display magnification obtained in the display magnification acquisition step based on the shape data of the house frame, the characters in the attribute table are converted into the map image for display. A map display method comprising: a house name drawing step drawn on the display map image generated in the forming step. 6. A map display in a distributed map display environment in which a map server holding an original map image read by a scanner and a plurality of map display systems displaying the map images on the map server are connected via a network. In the method
An original map image, a difference map image that is the difference between the original map image and the standard map image, or a combination of the standard map image and the difference map image is held on the map server, and the original map is stored in the map display system. A map display method, characterized in that a standard map image reduced in size is held, and when a map display system requires an original map image, the difference map image is transferred from a map server.