JP3378968B2 - Polygon component line automatic creation method and polygon component line automatic creation device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polygon composition line automatic creating method and a polygon composition line automatic apparatus, and particularly when preparing various drawings such as facility management maps, topographic maps, and design drawings.
The polygon constituent lines manually entered in the lower diagram for input as parallel lines are displayed on the lower diagram for input based on the interval between the parallel lines and the position data of the parallel lines obtained from the lower diagram for input. The present invention relates to automatic creation of polygon constituent lines by automatically drawing parallel lines that are more accurate in terms of width and parallelism than states.

In this specification, for convenience of description, as an example of various drawings, a pipeline such as a gas pipe or a water pipe buried in a road is indicated by a single line, and the pipeline is housed and protected. We will use a facility control chart that displays sheathed pipes, joint grooves, tunnels, etc. in the shape of polygons consisting of parallel lines, and also use 4 or 5 feature points that specify polygon constituent lines. To do.

[0003]

2. Description of the Related Art FIG. 13 is a diagram (part) for inputting a general facility control chart, where 21 is a road boundary line and 22 is a pipeline display line such as a gas pipe or a water pipe buried in the road. , 23 and 24 are polygon constituent lines showing a common groove or the like that accommodates them, points A to E are characteristic points of the polygon constituent line 23, and points A'to E'are polygon constituent lines 24. Each characteristic point is shown.

FIG. 14 is an explanatory diagram showing an outline of hardware when a general computer is used to create and modify facility control charts and the like. Reference numeral 31 is a host computer and 32 is map data. And a large-capacity disk external storage device for storing equipment data, 33 is a disk external storage device having an application program storage area 34 and a work area 35, and 36 is various data such as drawing numbers. An operation unit for inputting, 37 is a display unit for confirming the input state of various data and contents of created drawings, and 38 is a polygon constituent line 23,
Digitizer for inputting each feature point of 24, 39 is an input lower diagram in which the pipeline display line 22 and polygon constituent lines 23, 24, etc. are manually entered, 40 is a menu, 41 is a pointing device , 42 are plotters for outputting created drawings and the like.

Here, in order to create a drawing such as a facility control chart, the input lower drawing 39 is pasted on the digitizer 29, and the characteristic points of the pipeline display line 22 and the polygon constituent lines 23 and 24 on this are displayed. Each characteristic point (A point to E point and A'point to E'point)
Is input by operating the cursor of the pointing device 41.

[0006]

As described above, the conventional
In the method of inputting display lines on drawings such as facility control charts and converting them into data, each feature point of the polygon constituent lines manually entered in the input lower diagram is input as parallel lines and these are entered. Since it is used as it is, when one of the polygon constituent lines in the input diagram below is deviated from the other (when they are not parallel), the data will be created with this deviation, and There is a problem in that it is not possible to automatically create a polygonal constituent line that matches the actual width of the common groove and the like and has high parallel accuracy.

Therefore, in the present invention, in addition to the position data of each feature point on the polygon constituent line obtained from the input lower diagram, the distance between the polygon constituent lines and the like are also input and calculated from these input data. By performing the automatic diagram using the new feature points (corresponding to each feature point entered in the input diagram below), the width and parallelism accuracy of the polygon constituent lines on the drawing for automatic creation can be Aim to raise more than. Note that the term “parallel” used in this specification means, in addition to straight lines parallel to each other, one curve (for example, a semicircle) and the other curve obtained by moving the curve by a certain distance (for example, both end points of the semicircle. It also includes a relationship with the center point moved by a certain distance).

[0008]

FIG. 1 is a diagram for explaining the principle of the present invention. Reference numeral 1 is a part of the lower diagram for input, in which polygon constituent lines s and s'are manually entered as lines parallel to each other. A, B, C, and D are characteristic points of the polygon constituent line s to be input, and (A '), (B'), (C '), and (D') are polygon constituent lines s'that are not input. , And Z are designated points for giving direction data, which will be described later, and points A and B without parentheses are finally used as the characteristic points of the polygon constituent line. , Parenthesized (A '), (B'), etc. respectively represent points that are not finally used as feature points of the polygon constituent line. An input unit 2 inputs at least the following data. -The characteristic points A of the polygon constituent line s from the digitizer,
Direction data from the B, C and D position data digitizers indicating which side of the polygon constituent line s 'the polygon constituent line s' is, for example, position data at the Z point. The width data 3 indicating the distance w between the polygon constituent line s and the polygon constituent line s'from the operation unit is an application program, and based on these input data, the polygon structure not to be input Characteristic points of line s ', (A'),
New feature points corresponding to (B ′), (C ′) and (D ′) are calculated.

Here, the application program 3
Is a parallel line which is separated from the line portions AB, BC, and CD between adjacent feature points A, B, C, and D of the polygon constituent line s to be input by a distance w toward the Z point, and It is for setting each of the new feature points above, and the following processing is executed. Regarding the characteristic point A, a line parallel to the line portion AB and separated by the distance w in the direction designated by the direction data is obtained, and a perpendicular line is drawn from the characteristic point A to this line to calculate the intersection of the two. Regarding the feature point B, in parallel with the line portion AB and the line portion BC,
Two lines separated by the distance w in the direction designated by the direction data are respectively obtained to calculate the intersections of the two lines. Regarding the characteristic point C, in parallel with the line portion BC and the line portion CD,
Two lines separated by the distance w in the direction designated by the direction data are respectively obtained to calculate the intersections of the two lines. Regarding the characteristic point D, a line parallel to the line portion CD and separated by the distance w in the direction designated by the direction data is obtained, and a perpendicular line is drawn from the characteristic point D to this line to calculate the intersection of the two.
In addition, the execution order of each of the above steps 1 to 3 is arbitrary. A polygon is created using a line specified by these four intersections (which is different from the polygon non-target polygon constituent line s ′ and corresponds to this line).

FIG. 2 is a basic configuration diagram of the present invention, which is based on the following processing. ′ Each feature point of polygon constituent line s
In addition to (A), (B), (C) and (D), the position data of the feature points (A '), (B'), (C ') and (D') of the polygonal constituent line s'
Input each data. ′ From the midpoint A ′ between the feature points corresponding to these polygon constituent lines s, s ′, that is, the midpoint A ″ between the feature point A and the feature point (A ′), the feature point D and the feature point (D ′) The center line 4 specified by these is calculated by calculating up to the intermediate point D ″. It should be noted that, as will be described later, this intermediate point is merely an example of the point obtained in the step. ′ New feature points A, B, C, D on each parallel line and A ′, B ′, C ′, which are found on both sides of this center line 4 by the same method as in FIG. A polygon is created using the line 5 and the line 6 specified by D'and respectively.

[0011]

According to the present invention, instead of the input position data of each feature point of the polygon constituent lines written in the input lower diagram as lines parallel to each other, the position data and the width data between the lines are used. By using the position data obtained by a predetermined calculation process based on, the accuracy of the parallel line spacing and parallelism on the automatically created drawing is improved.

The set of input feature point position data (input feature point record) shown in FIGS. 1 and 2 is as shown in FIG. That is, in FIG. 1, the position data of each of the four characteristic points A to D are input in this arrangement order, and in FIG. 2, the points A to D and (A ') to (D') are input. The position data of each of the eight characteristic points are A point- (A ') point-B point- (B') point-C.
Input is made in the order of point- (C ') point-D point- (D') point.

Incidentally, "1" in the third area of the data number 1 is a flag indicating the starting point of the polygon constituent line, and the data number 4 (in the case of FIG. 1) and the data number 8 are set.
“2” in the third area (in the case of FIG. 2) is a flag indicating the end point of the polygon constituent line.

The polygon records generated in FIGS. 1 and 2 are shown in FIG. 4. In the case of FIG. 1, the input feature point A-the input feature point B-the input feature point C-the input feature point D- New feature point D'-new feature point C'-new feature point B'-new feature point A'-input feature point A consisting of position data of nine feature points. Feature point A-New feature point B-New feature point C
-New feature point D-New feature point D'-New feature point C'-New feature point B'-New feature point A'-New feature point A nine feature points de-
It consists of

As the header information of this polygon record, a sheath pipe material, a diameter of the sheath pipe, and a soil cover indicating the height of the soil portion on the sheath pipe are used.

In the step 'in FIG. 2, the division points are calculated by dividing the interval between the corresponding characteristic points of the polygon constituent lines s, s' into "n (n is an arbitrary positive number): 1". It suffices that the reference line specified by these be obtained, and the case where "n = 1" is the intermediate point.

Steps when using this reference line '
For the first dividing point and the last dividing point on the reference line, from the reference line portion between the immediately adjacent dividing point and one side thereof to one of "n: 1" in the interval w. The other side of "n: 1" in the interval w from the reference line portion to the other side, and the intersection point when a parallel line distant by a corresponding amount is obtained and a perpendicular line is drawn from this division point to this parallel line Is calculated as a new feature point by finding a parallel line that is distant by an amount equivalent to the above and dividing the perpendicular line from the dividing point to this parallel line.-For each dividing point in the middle of the reference line, immediately before that Two parallel lines distant from each of the reference line portions between the dividing point and the immediately following dividing point on one side thereof by an amount corresponding to one of "n: 1" in the interval w. The intersection of the two when obtained in, and the other side of each of the reference line parts In spacing w "n: 1" two parallel lines separated by for dividing corresponding to the other becomes the contents of calculating the intersection of both time determined individually as a new feature points.

Further, in FIG. 1, after calculating new feature points A ', new feature points B', new feature points C'and new feature points D ', those corresponding to the corresponding input feature points are compared. It is also possible to calculate an intermediate point obtained by dividing an interval (for example, an interval between the input feature point A and the new feature point A ') into two, and create a center line specified by these.

[0019]

Embodiments of the present invention will be described with reference to FIGS. Since the outline of the hardware used is the same as that shown in FIG. 14, the reference numbers will be used as necessary.

FIG. 5 is an explanatory view showing a menu 40 of the digitizer 38 used in the present invention, namely, an instruction for inputting a feature point, an instruction for a start point of a polygon constituent line, an instruction for an end point of a polygon constituent line, and a parallel line generation direction. It is equipped with input functions such as pointing point input instructions, centerline generation instructions, no centerline instructions, and buried section instructions.

FIG. 6 is an explanatory diagram showing a processing procedure corresponding to FIG. 1, and the contents thereof are as follows. (1) Determine whether the start point instruction or the end point instruction is set from the menu 40. If "YES", proceed to step (5) or (7). If "NO", proceed to the next step. move on. The process proceeds to step (5) when the start point is instructed, and the process proceeds to step (7) when the end point is instructed. (2) For input pasted on the digitizer 38 The coordinate data (x _i , y _i ) of the input feature points (A, B, C, D) shown in Fig. 39 below are sequentially input by operating the cursor of the pointing device 41. And proceed to the next step. (3) This coordinate data (x _i , y) is stored in the work area 35 and the process proceeds to the next step (see FIG. 3). (4) Return to step (1) as "i + 1 → i". (5) Go to the next step as “1 → i”. (6) Set “1 → F ₁ ” and return to step (1). In addition,
This F ₁ is a flag indicating the starting point and is the first input feature point A
Stored in the work area 35. (7) Set "i-1 → N" and proceed to the next step. This N indicates the number of input feature points, and in the case of FIG. 1, "4" is set. (8) Go to the next step with “2 → F _N ”. In addition,
This F _N is a flag indicating the end point, and the last input feature point D
Stored in the work area 35. (9) Width data indicating the distance w between the polygon constituent lines s and s'is input from the operation unit 36, and the process proceeds to the next step. (10) Input the coordinate data of the designated point Z for specifying on which side of the polygon constituent line s a new line corresponding to the polygon constituent line s'is to be generated. Input with the cursor operation of and proceed to the next step. (11) By the subroutine of FIG. 9, the coordinate data of the new feature points A'-D 'is calculated based on the coordinate data of each of the input feature points A-D, the width data, and the coordinate data of the designated point Z. -Calculate the data and proceed to the next step. (12) The polygon record (see FIG.
Reference) and proceed to the next step. (13) It is determined whether or not an instruction to generate a center line is given from the menu 40. If "YES", the process proceeds to the next step, and if "NO", the process proceeds to step (15). (14) Work area by calculating the coordinate data of each intermediate point by averaging the coordinate data of corresponding input feature points A to D and new feature points A'to D '. Stored in 35,
Go to the next step. (15) The coordinate data of the input feature point, the new feature point, and the intermediate point thus obtained are extracted and stored in the database (see FIG. 7).

FIG. 7 is an explanatory diagram showing the coordinate data of the input feature points, new feature points and intermediate points obtained by the processing procedure of FIG. 6, and the input coordinate data itself is in lower case. ,
Further, the coordinate data obtained by the predetermined calculation process is written in capital letters.

FIG. 8 and FIG. 9 are explanatory views showing the one-sided parallel line creating subroutine used in step (11) of FIG. 6, and the contents thereof are as follows. (21) Variables i and j are set to “0 → i, 1 → j” and the process proceeds to the next step. (22) Set “i + 1 → i” and proceed to the next step. (23) Call (x _i , y _i ) and F _i from the work area 35, and proceed to the next step. (24) It is determined whether or not “F _i = 1 or F _i = 2”. If “YES”, the process proceeds to the next step, and if “NO”, the process proceeds to step (34). (25) It is judged whether or not “F _i = 1”, and if “YES”, proceed to the next step, and if “NO”, proceed to step (4
Go to 2). (26) Go to the next step as “x _i → x _OLD , y _i → y _OLD ”. In addition, this coordinate data (x _OLD , y _OLD )
Is the coordinate data of the first input feature point, and in the case of FIG. 1, the coordinate data of point A. (27) Set “i + 1 → i” and proceed to the next step. (28) Call (x _i , y _i ) and F _i from the work area 35, and proceed to the next step. (29) Input feature points adjacent to the polygon constituent line s (x
_OLD , y _OLD ) and (x _i , y _i ) are calculated, f ₁ (x, y) indicating a parallel line separated by the distance w toward the designated point Z is calculated, and the process proceeds to the next step. . In addition, this f ₁ (x,
y) is obtained, for example, as shown in FIG.
It is calculated by the method shown in 12. (30) Obtain the intersection point coordinates (X _H , Y _H ) of the perpendicular line drawn from this parallel line from the input feature point (x _OLD , y _OLD ) and set it as “X _H → X _j , Y _H → Y _j ”. , Go to the next step. The coordinate data ( _Xj , _Yj ) is the coordinate data of the first new feature point, that is, the coordinate data of the point A'in FIG. (31) Set “j + 1 → j” and proceed to the next step. (32) It is determined whether or not “F _i = 2”. If “YES”, the process proceeds to step (43), and if “NO”, the process proceeds to the next step. Here, the case of "YES" is when the input feature point next to the start point is the end point. (33) Step as "x _i → x _OLD , y _i → y _OLD "
Return to (22).

By the above processing procedure, the new feature point corresponding to the first input feature point (start point) is specified,
After that, the processing for the second, third, ... Input feature points following the start point is executed.

(34) "f ₁ (x, y) → f _OLD (x, y)"
And proceed to the next step. (35) As in step (29), f ₁ (x, y) is calculated, and the process proceeds to the next step. _{(36) f OLD (x,} y) the slope of a _OLD and f ₁ (x, y) in search of a gradient a ₁ in, proceed to the next step. (37) Judge whether the difference between the respective slopes is equal to or more than a predetermined value, and if "YES", proceed to the next step, "NO"
If yes, go to step (39). In addition, specifically, (a ₁
-A _OLD ) / a _OLD absolute value is a predetermined value, for example "0.001
It is calculated whether it is greater than. (38) The solution of two equations of f _OLD (x, y) = 0 and f ₁ (x, y) = 0 is obtained, and the solution is calculated by using the coordinate data (X _j , Y _j ) and step (41)
Proceed to. (39) Let y _j be the value of y obtained when “x = x _OLD ” in the formula of f ₁ (x, y) = 0, and proceed to the next step.
Instead of f ₁ (x, y) = 0, f _OLD (x, y) = 0 may be used. (40) _Set “x _OLD = X _j ” and proceed to the next step. (41) Return to step (33) as "j + 1 → j". (42) As “f ₁ (x, y) → f _OLD (x, y)”, proceed to the next step. (43) As in step (29), f ₁ (x, y) is calculated, and the process proceeds to the next step. (44) From input feature points (x _i , y _i ) to f ₁ (x, y)
The intersection point coordinates (X _H , Y _H ) of the perpendicular line drawn to the parallel line are calculated to be “X _H → X _j , Y _H → Y _j ”, and the subroutine ends. The coordinate data ( _Xj , _Yj ) is the coordinate data of the last new feature point, that is, the coordinate data of the point D'in FIG.

FIG. 10 is an explanatory diagram showing a subroutine for polygon record generation used in step (12) of FIG. 6, and the contents thereof are as follows. (51) The variables k and i are set to “1 → k, 1 → i” and the process proceeds to the next step. Incidentally, k is a variable indicating the data number of the polygon record. (52) It is determined whether or not "i>N". If "YES", the process proceeds to step (55), and if "NO", the process proceeds to the next step. Note that N is a value indicating the number of input feature points,
Here, "YES" is set when the coordinate data of the input feature points (points A to D) have been captured, and then the new feature points (points D'to A ') and the last one. The process of taking in the coordinate data (x ₁ , y ₁ ) of the starting point (point A) which becomes the polygon data is executed. (53) Go to the next step with "x _i → X _k , y _i → Y _k ". Note that x _i and y _i are the coordinate data of the input feature points. (54) Return to step (52) as "i + 1 → i, k + 1 → k". (55) Set “0 → i” and proceed to the next step. (56) It is determined whether or not "i = N". If "YES", the process proceeds to step (60), and if "NO", the process proceeds to the next step. (57) Go to the next step with "N-i → j". (58) As “X _j → X _k , Y _j → Y _k ”, proceed to the next step. Note that X _j and Y _j are the coordinate data of the new feature points. (59) Return to step (55) as "i + 1 → i, k + 1 → k". (60) The subroutine is ended with "x ₁ → X _k , y ₁ → Y _k ".

The calculation and generation of new feature points and polygon records in the case of FIG. 2 are also performed based on the coordinate data of each intermediate point which specifies the center line 4 and the width data of w / 2. 8 to 10
The procedure is similar to that shown in.

In this case, since the designated point Z is not input, in step (29) of the subroutine of FIG. 8, from the line connecting (x _OLD , y _OLD ) and (x _i , y _i ). It suffices to obtain parallel lines on both sides thereof separated by a distance w / 2.

FIG. 11 is an explanatory diagram showing a process of inducing “f ₁ (x, y) = 0” which is a parallel line of step (29) in FIG. 8, and FIG. 12 is a premise thereof. It is explanatory drawing which shows the process of calculating the creation side of a parallel line from the reference line vector L and the designated points Z and Z '.

The pointing point Z is the case where the digitizer is input to the left side of the reference line vector L, and the pointing point Z '.
Is the case where the digitizer is input to the right side of this reference line vector L, and the reference line vector L at this time is the line portion of the polygon constituent line s closest to the designated point (the line connecting adjacent feature points). It is a thing.

Here, the parallel movement distance b between the reference line vector L and the parallel line L'in FIG. 11 and the distance l in the y-axis direction between the reference line vector L and the designated points Z and Z'in FIG. Both are positive values, and whether v in the equation of the parallel line L ′ is “+1” or “−1” is uniquely determined by the positional relationship between the designated points Z and Z ′ and the sidewalk line vector L. .

That is, as is apparent from FIG. 12, when f (x, y) is obtained for the designated point Z, it always becomes a negative number,
When f (x, y) is obtained for the designated point Z ', it always becomes a positive number, and this sign is used as the value of v.

Therefore, the operator specifies the designated points Z and Z '.
When any one of the above is input to the digitizer, the sign of v is determined by the calculation of FIG. 12, and as a result, for each reference line vector L corresponding to the line portion of the polygon constituent line s, “f _{1 of} FIG.
(X, y) = 0 ”is calculated, and new line vectors are sequentially obtained to the right or left of the line portion.

In the above description, it is assumed that the polygon constituent lines are closed, but at the stage of the automatic diagram, the starting points of the polygon constituent lines s and s ′ are Whether or not to connect the end points is arbitrary.

[0035]

As described above, according to the present invention, in addition to the position data of each feature point on the polygon constituent line obtained from the input lower diagram, the interval of the polygon constituent line is also inputted, and these input data are inputted. Since the automatic drawing is performed using the new feature points (corresponding to each feature point entered in the input lower diagram) calculated from the data, High accuracy can be achieved.

[Brief description of drawings]

FIG. 1 is a diagram illustrating the principle of the present invention.

FIG. 2 is a basic configuration diagram of the present invention.

FIG. 3 is an explanatory diagram showing an input feature point record of the present invention.

FIG. 4 is an explanatory diagram showing a generated polygon record of the present invention.

FIG. 5 is an explanatory diagram showing an example of a menu on a digitizer according to the present invention.

FIG. 6 is an explanatory diagram showing a processing procedure corresponding to FIG. 1;

7 is an explanatory diagram showing an example of a data format of a work file in the processing procedure of FIG.

FIG. 8 is an explanatory view (No. 1) showing the one-sided parallel line generation subroutine used in step (11) of FIG. 6;

FIG. 9 is an explanatory view (No. 2) showing the one-sided parallel line generation subroutine used in step (11) of FIG. 6;

FIG. 10 is an explanatory diagram showing a subroutine for polygon record generation used in step (12) of FIG. 6;

11 is a parallel line "f" of step (29) in FIG. 8;
It is explanatory drawing which shows the process of inducing " ₁ (x, y) = 0".

FIG. 12 is an explanatory diagram showing a process of calculating the creation side of the parallel line “f ₁ (x, y) = 0” in FIG. 11 from the reference line vector L and the designated points Z and Z ′.

[Fig. 13] General diagram for inputting facility control chart (partial)
FIG.

FIG. 14 is an explanatory diagram showing an outline of general hardware for performing creation / correction processing of a facility control chart and the like using a computer.

[Explanation of symbols]

In FIG. 1 ... Below for input 2 ... Input section 3 ... Application program s ... Polygon constituent line of input target s' ... Polygon constituent line that is not input w: interval between polygon constituent lines s and s' Z: A designated point for indicating the generation direction of parallel lines

─────────────────────────────────────────────────── ─── Continued Front Page (58) Fields surveyed (Int.Cl. ⁷ , DB name) G06T 1/00 G06T 11/60-11/80 G06F 17/50 G09B 29/00-29/10

Claims (4)

(57) [Claims] 1. Position data for each characteristic point of one of the polygon constituent lines and the other line of the polygon constituent lines, which are entered as parallel lines to each other in the figure below for input, and width data for the interval between the lines. On the basis of the above, in the polygon constituent line automatic creation method for automatically creating parallel lines consisting of each feature point and a new alternative feature point, between the corresponding feature points of the one line and the other line, "n" 1 (n is an arbitrary positive number) ", a dividing point calculating step for calculating the dividing points based on the position data, and the first dividing point and the last dividing point of the reference line specified by these dividing points. Regarding the division point of, the first parallel line separated from the reference line portion between the immediately adjacent division points on one side thereof by an amount corresponding to one of the "n: 1" of the interval, And the other from the reference line A second parallel line separated by an amount corresponding to the other of the "n: 1" of the intervals is obtained based on the width data, and a perpendicular line is drawn from each division point to each parallel line. Each intersection is calculated as the new feature point, and for each of the dividing points in the middle of the reference line, these are calculated from the reference line portion between the dividing point immediately before the dividing point and the dividing point immediately after the dividing point. On one side of the third and fourth parallel lines separated by an amount corresponding to one of the "n: 1" of the spacing, and the "of the spacing" on the other side from each of the reference line portions. The fifth and sixth parallel lines separated by an amount corresponding to the other of "n: 1" are obtained based on the width data, and the third, fourth
And a new feature point calculating step of calculating the intersections of the parallel lines and the intersections of the fifth and sixth parallel lines as the new feature points. 2. The step of calculating new feature points, in the case where the inclinations of the respective reference line portions with respect to the dividing points on the reference line are substantially the same, intersections of the third and fourth parallel lines And, instead of the intersection of the fifth and sixth parallel lines, an intersection when a perpendicular is drawn from the division point to any of the third and fourth parallel lines, and from the division point to the fifth and fifth parallel lines. The polygonal composition line automatic creation method according to claim 1, wherein an intersection point when a perpendicular line is drawn on any of the parallel lines of 6 is calculated as the new feature point. 3. The position data regarding each characteristic point of one line and the other line of the polygon constituent line, which are entered as parallel lines in the lower diagram for input, and the width data regarding the interval between the lines. Based on this, in a polygon constituent line automatic creation apparatus for automatically creating parallel lines consisting of these feature points and alternative new feature points, a storage means for holding the position data and the width data, and the one line And dividing point calculating means for calculating dividing points for dividing the corresponding characteristic points on the other line into "n: 1 (n is an arbitrary positive number)" based on the position data. For the first and the last dividing points of the reference line specified by these dividing points, from the reference line portion between the dividing points immediately adjacent to the dividing line, the “n 1: 1 ”apart A first parallel line and a second parallel line separated from the reference line portion on the other side by an amount corresponding to the other of the "n: 1" of the intervals, based on the width data. Obtained, calculate each intersection point when a perpendicular is drawn from the division point to each parallel line as the new feature point, and for each of the division points in the middle of the reference line, the division point immediately before that. And third and fourth parallel lines distant from each reference line portion immediately after that and to one side thereof by an amount corresponding to one of the "n: 1" of the spacing, and Based on the width data, there are obtained fifth and sixth parallel lines distant from the respective reference line portions on the other side by the amount corresponding to the other of the "n: 1" of the intervals. 3rd and 4th
And a new feature point calculating means for calculating the intersections of the parallel lines and the intersections of the fifth and sixth parallel lines as the new feature points. 4. The new feature point calculating means, when the inclinations of the reference line portions with respect to the dividing point on the reference line are substantially the same, the intersection point of the third and fourth parallel lines And, instead of the intersection of the fifth and sixth parallel lines, an intersection when a perpendicular is drawn from the division point to any of the third and fourth parallel lines, and from the division point to the fifth and fifth parallel lines. The automatic polygon configuration line creation apparatus according to claim 3, wherein an intersection point when a perpendicular line is drawn on any of the parallel lines of 6 is calculated as the new feature point.