JP2557591B2 - Guide map creation processing method - Google Patents

Description

Detailed Description of the Invention

[0001]

The present invention relates to a guide map creating process for automatically creating an easy-to-see guide map with the center of the line segment connecting the nearest station and destination as the center of the map in order to create a guide map. It is related to the method.

[0002]

2. Description of the Related Art Conventionally, (i) the destination is placed in the center of the guide map, (ii) the station closest to the destination is placed in the center of the guide map, (iii) or the nearest station and destination It is created by using a method such as taking a circumscribing quadrangle including and and arranging it at the intersection of the diagonal lines.

[0003]

In the conventional case, since the physical size of the display area is fixed, the guide map created by the vector data is enlarged / reduced to make the guide map easy to see to some extent. It is possible. However, when priority is given to visibility when there are a plurality of nearest stations, there is a problem that stations other than the station closest to the destination may be missing from the guide map.

Further, even when a plurality of stations are included in the guide map, the stations may be drawn on the edge of the map when the distance from the destination is long, which causes a problem that it is difficult to see.

Furthermore, when creating a guide map using a circumscribed quadrangle, stations and destinations are always included in the guide map, but when the distance between the destination and the station is long, there is a destination at the end of the guide map. Therefore, there may be little information in the center, which may defeat the purpose of creating a map that is easy to see.

An object of the present invention is to automatically create a guide map for making information of both the nearest station and the destination easier to see.

[0007]

FIG. 1 is a block diagram showing the principle of the present invention. In the figure, reference numeral 1 is a guide map creation control unit, 2 is a guide map creation unit, 3 is a nearest station selection unit, 4 is a representative point determination unit, and 5 is a vector data map storage unit. The vector data map storage unit 5 stores information on desired town streets and information on desired objects (stations, shops, etc.) together with position coordinates.

When the destination is determined, the guide map creating unit 2 requests the nearest station selecting unit 3 to search for the nearest station from the distance between the destination and the station. Incidentally, with respect to the position of the target object, a representative coordinate point is determined. The guide map creation unit 2 determines the midpoint position between the nearest station and the destination and creates a guide map.

[0009]

[Operation] Calculated by weighting the distance from the destination,
Find the center using points that represent multiple nearest stations.

In the prior art, the center is calculated by using no station information at all or by using only one station information. Alternatively, there is also a method in which a circumscribed quadrangle including all of the nearest stations and destinations is taken and the intersection of the diagonal lines is placed at the center of the map.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 2 shows an example of the apparatus configuration of an embodiment of the present invention.
In the figure, reference numeral 1 is a guide map creation control unit, 2 is a guide map creation unit, 3 is a nearest station selection unit, 4 is a representative point determination unit, 5 is a vector data map storage unit, 6 is a map output control unit, and 7 is A guide map, 8 is a display, and 9 is a keyboard.

Description will be given below with reference to the image diagram of the destination and the station shown in FIG. In Figure 3, the black circle is the destination,
The white circles represent the stations and the double circles represent the positions of the stations determined to be the nearest stations.

The operator determines the distance L _max from the destination A and
The circle B and the distance B between the circles are input in advance from the keyboard 9 or the like. The coordinate value of the destination designated by the guide map creation control unit 1 is obtained from the vector data map storage unit 5. The guide map creation unit 2 obtains a plurality of candidate stations from the data that combines the station name and its coordinate value, the coordinate value of the destination, and the value of L _max . The nearest station that is a candidate from this to the destination is determined by the nearest station selection unit 3, and based on that,
The representative point determination unit 4 determines a point representing the nearest station. The midpoint between the representative point and the destination is obtained, and the midpoint is placed at the center of the area, and the guide map creation unit 2 creates a guide map to be displayed in the determined area. The guide map creation control unit 1 displays the created guide map on the display 8 or requests the map output control unit 6 to output the guide map to an output device such as a facsimile or a printer.

The nearest station selection section shown in FIG. 2 performs the following processing.
I do. Destination A, S nearest station _i(I = 1, 2, 3
...). Nearest station S_iIs (1) the upper limit L of the distance from the destination A_max (2) Upper limit N of the number of target stations_max Determined by Distance L_maxTo split into
Interval B is decided in advance. Maximum distance from destination A
And the number is N_maxIf it exceeds, the distance (L_{ma x}−
Select the nearest station within the circle of B). Selected by this
The number of stations n is N_{ma x}Repeat the above until
Do it again.

Next, a representative point is obtained using the nearest station S _i obtained above and the distance d _i from the destination. This is performed by the representative point determination unit 4 shown in FIG. If the representative point is G,

[0016]

[Equation 1]

Finally, the midpoint C between the representative point G and the destination A is taken, and the point C is placed at the center of the area. This is performed by the guide map creation unit 2 shown in FIG. That is, C _x = {A _x + G _x } / 2 C _y = {A _y + G _y } / 2 Further, if there is only one nearest station, the destination A
C may be the midpoint between the nearest station S and.

C _x = {A _x + S _x } / 2 C _y = {A _y + S _y } / 2 FIG. 4 is an image diagram of the result.

The vector data map storage unit 5 shown in FIG. 2 stores information in the following form. now,
It is assumed that A town is divided as shown in FIG. In this case, the information shown in FIG. 6 is (i) name, (ii) postal code, (i
It is stored as ii) address code and (iv) figure No. (x, y). In the case of the figure, for example, A town 1-chome has coordinates (2,
1), (3,1), (4,1), (2,2), (3
2), (4, 2) ...

Further, there is a so-called layer for each figure No. (x, y) shown in FIG. 6, and the same type and same shape are grouped together. FIG. 7 is a diagram showing a building layer, and FIG.
FIG. 3 is a diagram showing a road layer.

In FIG. 7, (i) Diagram No. (x,
y), (ii) Sequence number in the figure, (iii) Address code, (i
v) Number of coordinate points / value and (v) Name are described. For example α
α-so is located at (2, 1) in the figure No. (x, y), "196" in the sequence No. in the figure, and "35" in the address code.
62963 ”, and the number of coordinate points is“ 4 ”and the coordinate value is (X ₁ , Y ₁ ) ... (X ₄ ,
Y ₄ ).

In FIG. 8, (i) number of coordinate points, (ii) starting point diagram No., (iii) starting point coordinate values, ..., (iv) end point diagram N
o., (v) End point coordinate value is described. For example, a road has a starting point coordinate value (X
It is located at the end point coordinate value (X ₁₅ , Y ₁₅ ) in the position of Figure No. (3, ₁ ) from ₁ , ₁ , Y ₁ ) and the road is curved and the position is expressed by 15 coordinate points. It is shown that

The guide map creating section 2 selects targets from the building layers and collects them as one data. FIG. 9 shows the result of collecting the information on the target object.
In FIG. 9, (i) target object data name, (ii) diagram No.
, (Iii) Sequence No. in the figure and (iv) Representative points are summarized. For example, in the case of ββ liquor store, (a) (X ₁ ″, Y ₁ ″) ... (X ₄ ″, Y ₄ ″)
(B) or the representative points X ″, Y ″ are defined as X ″ = (1/4) (X ₁ ″ + X ₂ ″ + X ₃ ″ + X ₄ ′. ') Y ″ = (1/4) (Y ₁ ″ + Y ₂ ″ + Y ₃ ″ + Y ₄ ″). When the destination is given, the data about the destination is registered as one of the information shown in FIG. Then, the distance between the destination and the station, the distance _{= {(X M -X S)} 2 + (Y M -Y S) 2} 1/2 ( where, (X _M, X _M) representative of the destination Point (Y _S ,
Y _S ) is given at the station's representative point).

As described above, the destination and the nearest station can be gathered in the center of the area where the destination and the nearest station are displayed, as compared with the conventional technique, and the guide map which is easier to see can be automatically generated.

[0025]

As described above, according to the present invention,
The guide map creator can determine the conditions for the nearest station, place the destination closer to the center, and arrange the nearest station closer to the center. Has the advantage that it can provide a guide map that is easier to see.

[Brief description of drawings]

FIG. 1 shows a principle configuration diagram of the present invention.

FIG. 2 shows an example of a device configuration according to an embodiment of the present invention.

FIG. 3 shows an image diagram of a destination and a station.

FIG. 4 shows an image diagram of the results.

FIG. 5 shows a division view of town A.

FIG. 6 shows town chome data.

FIG. 7 shows a building layer.

FIG. 8 shows a road layer.

FIG. 9 shows information about a target object.

[Explanation of symbols]

 1 Guide map creation control unit 2 Guide map creation unit 3 Nearest station selection unit 4 Representative point determination unit 5 Vector data map storage unit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-5-19685 (JP, A) JP-A-3-91794 (JP, A) JP-A-2-302616 (JP, A)

Claims (1)

(57) [Claims] 1. A guide map creating process for displaying a map including a destination and a nearest station to reach the destination in an area of a predetermined physical size based on a map input as vector data into a computer. In the method, the nearest station selection unit that selects multiple candidate nearest stations, the representative point determination unit that weights the distance from the destination and determines the representative point of the plurality of nearest stations, and the point and the destination A guide map creation processing method characterized by automatically creating a guide map with a guide map creation section that creates a guide map centered on the midpoint.