JP2001092350A - Map preparing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a map preparing method capable of preparing map information in an arbitrary prescribed area along the route figure selected by an user so as to conform to a use purpose. SOLUTION: In this map preparing method, sets arbitrary cut-out widths are set on both sides from a starting place to a target place of a selected route figure (network) in the road network displayed on a display device 25 and cuts out the cut-out widths by a cut-out processing part 213 and displays map information conformed with the use purpose in detail in this cut out area and prepares the map information.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a map creating method for creating a map from a departure point to a destination in any form desired by a user using digitalized map information.

[0002]

2. Description of the Related Art Generally, digital maps converted into digital information are sold by storing map information on a large-capacity medium such as a CD-ROM for each country or region. For this reason, the user has the inconvenience of having to purchase map information other than the necessary area.

In order to solve this inconvenience, it is conceivable that all map information is stored in a storage device of a server, and a user takes in and uses the map information of the server via a network at a terminal. Have been. The map information of the server includes a road (traffic) network map, a road map,
There is a house map and target information (spatial information).

Distributing map information stored in a storage device of a server to a remote terminal is disclosed in, for example,
-282879.

[0005]

Conventionally, it has been known to create a route map from a departure place to a destination, but it is only necessary to search for a destination around the destination and create a route map. is there. For this reason, there is a problem that it is not possible to create a map of only information necessary for the user such as a road, a house, and a target in an arbitrary predetermined area along a route map from a departure place to a destination.

There is a strong demand for users who use the map information of the server to be able to create a route map suitable for the purpose of use.

An object of the present invention is to provide a map creation method capable of creating map information in an arbitrary predetermined area along a route map selected by a user so as to meet a purpose of use.

[0008]

A feature of the present invention is that an arbitrary cutout width is provided on both sides from a departure point to a destination of a route map (network) selected on a road network displayed on a display device. It is to set and cut out, and to display and create the map information suitable for the purpose of use in this cutout area in detail.

Another feature of the present invention is that a cutout is set by setting an arbitrary cutout width on both sides from a departure point to a destination of a route map (network) selected on the road network displayed on the display device. Another object of the present invention is to display map information suitable for the purpose of use in the cut-out area in detail and to display and create a frame map of an intersection.

According to the present invention, an arbitrary cut-out width is set on both sides from a departure point to a destination of a selected route map (network), and the cut-out area displays map information suitable for the purpose of use in detail. Since the map is created by the user, a map suitable for the purpose of use can be easily created.

[0011]

FIG. 1 shows an embodiment of the present invention.

In FIG. 1, a map server 1 for distributing map information and a terminal 2 of a user who uses the map information are connected via a network 3.

The map server 1 has a central processing unit (CPU).
11, an external storage device 13, an operation input device 14, a display device 15, and a communication device 16. These devices are connected via a system bus 17. The central processing unit 1 has a memory 12, and the external storage device 13 stores a database including road network information, road map information, house map information, and target (space) information.
The external storage device 13 and the memory 12 also store programs and data for executing processing. The operation input device 14 includes a mouse for giving a pointing instruction.

On the other hand, the terminal 2 is constructed similarly to the map server 1, and has a central processing unit 21, a memory 22, an auxiliary storage device 23, an operation input device 24, a display device 25, and a communication device 26.
And a system bus 27. Operation input device 2
Reference numeral 4 includes a mouse for giving a pointing instruction in the same manner as the operation input device 14.

FIG. 2 is a functional block diagram of the central processing unit 21 in the terminal 2 which is a main part of the present invention.

The operation of creating a route diagram in the embodiment shown in FIGS. 1 and 2 will be described below with reference to flowcharts shown in FIGS.

Normally, the auxiliary storage device 23 of the terminal 2
The following describes a case in which map information is created by receiving map information from the map server 1.

The terminal 2 requests map information from the map server 1 via the network 3 when the auxiliary storage device 23 does not have the map information of the area to be created. The map server 1 receives a request for map information from the terminal 2 and distributes the request to the terminal 2 via the network 3. Such general server processing is executed by the central processing unit 11 of the map server 1.

The map creator (user) operates the operation input device 24
Is input from the operation input unit 211 to the route search unit 212. Route search unit 212
Reads information on road connections, intersections and stations from the traffic network database 131 stored in the external storage device 13 of the map server 1 in step S1 of FIG. 3, and displays the road network on the display device 25 by the display editing unit 216. I do. The display device 25 displays a road network as shown in FIG.

In step S2, a departure place, a transit point, and a destination are input from the operation input device 24 onto the road network displayed on the display device 25.

The route search section 212 performs a route search process in step S3, and inputs the departure point 5 as shown in FIG.
1. The optimal route (selected route) is searched using the database 131 based on the waypoint 52 and the destination 53.

The route search can be obtained by, for example, the Dijkstra method which is a well-known route search method.

The selected route 5 searched by the route search unit 212
4 is identified and displayed by the display editing unit 216 as shown in FIG. The fact that the selection path 54 is identified and displayed is apparent by comparing FIGS. 6 and 7. Selection path 54
Is performed by color change display, flicker display, or the like.

In step S4 of FIG. 2, when a cutout width Δd for cutting out a road map is input from the operation input device 24, the cutout processing section 213 executes the road map database 1
The extraction processing of 32 road map data is performed. Although the cutout process will be described later in detail, a road map of a region having a cutout width Δd that can be arbitrarily set on both sides of the selected route 54 is cut out.

The cutout area 60 cut out by the cutout processing section 213 is displayed on the display device 25 by the display editing section 216 as shown in FIG.

When the extraction processing of the extraction processing section 213 is completed, the processing shown in FIG. 4 of the road information extraction section 214 is executed.

The road information extraction unit 214 extracts the intersections and stations of the roads included in the searched selected route 54 from the house map database 133 as more detailed intersections and detailed map areas of the stations (step S5). Intersections and stations correspond to nodes in the road network, and by extracting their positions, intersections and stations on the house map can be cut out.

In step S5, as shown in FIG. 9, from the selected route (optimum route) 54 to the departure point 51, intersection 55,
6, 57, 58, and the position of the destination (station) 53, and the intersection and the station of the house map corresponding to the taken-out position are indicated by a house map database 133 as shown in a frame map 70 shown in FIG.
It will be cut out from.

In the frame map 70 of FIG. 10, the traveling direction at the intersection, which is the route search result, is indicated by an arrow 71 for each intersection.

Next, in step S6, the user selects the selected route 5
When a search item (such as a category of a target object) of the spatial information in the cutout area 60 of No. 4 is input from the operation input device 24, the target object information (spatial information) along the selected route 54 searched for in the target object in step S7. Information database 1
Search from 34.

The target, which is spatial information, is, for example, a restaurant,
There are buildings, public buildings and financial institutions. This information is pre-categorized into the landmark information database 134,
The relationship between the location information and the road to which the target belongs is stored.

In step S7, using the category of the target inputted from the operation input device 24, the cutout area 60 shown in FIG. 9 obtained by the cutout processing section 213 from the database 134 storing information on restaurants, gas stations, etc. You will search for landmarks in the area.

The map cut out along the selection path 54 shown in FIG. 9 and the frame map shown in FIG. 10 are displayed on the display device 25 by the display editing unit 216.

When the extraction processing of the road information extraction section 214 is completed, the processing shown in FIG.

The map creating section 215 displays the target extracted by the road information extracting section 214 on the display device 109 in step S8 as shown in FIG.
0 and 81 are displayed on the road map. Also, the frame map 70 shown in FIG. 10 extracted by the road information extraction unit 214 is collectively displayed below the road map as shown in FIG.

Next, in step S9, step S5
As shown in FIG. 11, the top map 70 cut out from the house map and the map obtained by mapping the target searched in step S8 to the road map cut out in step S4 are integrated as shown in FIG. 11 to create a personal map.

The personal map is created in this manner. Next, with reference to FIGS. 12 to 14, the extraction processing of the extraction width Δd which can be arbitrarily set along the selection path 54 performed by the extraction processing unit 213 will be described. I will explain.

The cut-out processing section 213 executes the processing of the starting point (departure point) shown in FIG. When the process of the starting point in step S11 is completed, the process proceeds to step S12, and it is determined whether all the roads for which the route has been searched have been processed. If all have been performed, step S2
Then, the process goes to 3 to execute the processing of the arrival point (destination) shown in FIG.

If the processing of the road has not been completed in step S12, the process proceeds to step S13, where the road data from the road network database 131 to the intersection and the destination (destination point) are read. It is determined in step S14 whether the vehicle has reached the intersection or the arrival point, and if it has arrived, the process returns to step S12. In step S14, it is determined what is shown in FIG.

If it is determined in step S14 that the vehicle has not reached the intersection or the arrival point, the flow shifts to step S15 to read the next line segment which is a part of the road data from the road network database 131.

In step S16, a formula for a straight line on the coordinates of the line segment read in step S15 is obtained. In step S17, a parallel line that is translated by the cutout width Δd on both sides of the straight line from the equation of the straight line obtained in step S16 is obtained as shown in FIG.

In step S18, the end point of the parallel line is determined, and in step S19, the intersection with the immediately preceding parallel line is determined as shown in FIG. In step S20, it is determined whether there is an intersection. If there is an intersection, the process proceeds to step S22 to store the coordinates of the intersection.

If there is no intersection in step S20, the intersection is obtained by extending the previous parallel line and the parallel line obtained this time in step S21. The coordinates of the intersection obtained in step S21 are stored in step S22.

When the intersection storing process in step S22 is completed, the process returns to step S14 and is repeatedly executed until the intersection is reached.

Next, the processing in step S11 will be described with reference to FIG.
3 will be described.

First, in step S31, a line segment from the departure point to a road data break or intersection is read from the road network database 131. Step S3
In step 2, the equation of the straight line of the line segment (road) read in step S31 is obtained. In step S33, from the equation of the straight line obtained in step S32, a parallel line that is translated on both sides of the straight line by the cutout width Δd as shown in FIG. 17 is obtained.

In step S34, the end point of the parallel line is obtained, and in step S35, the end point obtained by adding the cutout width Δd to the end point of the parallel line is obtained as shown in FIG. Step S36
Save the coordinates of the end point to which the cutout width Δd has been added.

FIG. 14 shows the contents of the arrival point processing in step S23 in FIG.

In step S 41, a line segment from a road data break or intersection to a destination is read from the road network database 131. In step S42, the equation of the straight line of the line segment (road) read in step S41 is obtained. In step S43, the cut-out width Δd is applied to both sides of the straight line from the equation of the straight line obtained in step S42 as shown in FIG.
Find a parallel line that has been translated only by

In step S44, the end point of the parallel line is obtained, and in step S45, the end point obtained by adding the cutout width Δd to the end point of the parallel line is obtained as shown in FIG. Step S46
Save the coordinates of the end point to which the cutout width Δd has been added.

As described above, the clipping process is performed along the selected route selected on the road network. The clipping region can be made any size depending on the size of the clipping width Δd.

According to the present invention, a road map is created as described above. Arbitrary cutting is performed on both sides from the departure point to the destination of the route map (network) selected by the road network displayed on the display device. Set the width and cut out,
Since the map information suitable for the purpose of use is created and displayed in detail in the cut-out area, a map suitable for the purpose of use can be easily created.

Although the above embodiment has been described with reference to the case where the map information is created by receiving the distribution of the map information from the map server 1, the map information may be created using the map information stored in the auxiliary storage device 23 of the terminal 2. Needless to say, map information that is not stored in the auxiliary storage device 23 of the terminal 2 may be created by receiving distribution from the map server 1.

[0054]

According to the present invention, an arbitrary cut-out width is set on both sides from the departure point to the destination of the selected route map (network), and the cut-out area is provided with map information suitable for the purpose of use. Since the map is created by displaying it in detail, a map suitable for the purpose of use can be easily created.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing one embodiment of the present invention.

FIG. 2 is a configuration diagram showing a main part of one embodiment of the present invention.

FIG. 3 is a flowchart for explaining the operation of the present invention.

FIG. 4 is a flowchart for explaining the operation of the present invention.

FIG. 5 is a flowchart for explaining the operation of the present invention.

FIG. 6 is a diagram showing an example of a display screen for explaining the present invention.

FIG. 7 is a diagram showing an example of a display screen for explaining the present invention.

FIG. 8 is a diagram showing an example of a display screen for explaining the present invention.

FIG. 9 is a diagram showing an example of a display screen for explaining the present invention.

FIG. 10 is a diagram showing an example of a display screen for explaining the present invention.

FIG. 11 is a diagram showing an example of a display screen for explaining the present invention.

FIG. 12 is a flowchart for explaining the operation of the present invention.

FIG. 13 is a flowchart for explaining the operation of the present invention.

FIG. 14 is a flowchart for explaining the operation of the present invention.

FIG. 15 is a diagram for explaining the operation of the present invention.

FIG. 16 is a diagram for explaining the operation of the present invention.

FIG. 17 is a diagram for explaining the operation of the present invention.

FIG. 18 is a diagram for explaining the operation of the present invention.

[Explanation of symbols]

1 ... Map server, 2 ... Terminal, 3 ... Network, 1
1, 21, central processing unit, 12, 22, memory, 13,
23: external storage device, 14, 24: operation input device, 1
5, 25 ... display device, 131 ... road network database, 132 ... road map database, 133 ... Housing map database, 134: Target object (space) information database, 211: Operation input unit, 212: Route search unit,
213 ... cut-out processing unit. 214... Road information extraction unit, 21
5 ... Map creation unit, 216 ... Display editing unit,

Claims (4)

[Claims] 1. A road network map is displayed on a display device, a destination including a stopover is inputted from a departure point, a selected route is determined, and a cutout width is set on both sides of the road network of the selected route to cut out the map. And generating a road map by selectively displaying the required map information in the cut-out area on the display device. 2. A road network map is displayed on a display device, a departure point and a destination are input, a selected route is determined, the selected route is identified and displayed, and cut-out widths are set on both sides of the road network of the selected route. A map extraction method for selecting a map information including a required road, a house, and an object in the extraction area, and displaying the selected map information in detail on the display device to create a road map. 3. A road network map is displayed on a display device, a destination including a stopover is inputted from a departure point, a selected route is determined, and a cutout width is set on both sides of the road network of the selected route to cut out the map. And generating a road map by selectively displaying the required map information in the cutout area on the display device and displaying a frame map of the intersection on the selected route. 4. A road map is created by receiving map information from a map server. A road network map is displayed on a display device, and a destination including a stopover is inputted from a departure place to determine a selected route. Then, map cutout is performed by setting equal cutout widths on both sides of the road network of the selected route, and map information including the required roads, houses, and objects in the cutout area is selectively displayed on the display device. A map creation method characterized by creating a road map.