JP3286366B2 - Inspection apparatus for contour data and automatic drawing input system including the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contour line data inspection apparatus and a drawing including the same, which are used in a drawing input system for digitizing a map or a marine chart including contour lines or water depth lines, or a weather chart including contour lines. It relates to an automatic input system and the like.

[0002]

2. Description of the Related Art In an automatic drawing input system, a drawing such as a design drawing or a map read by an image scanner is subjected to thinning processing, converted into vectorized data approximated by a broken line, and processed as it is or edited. Saved later. For graphic data including a curve group having height information such as a map, a marine chart, or a weather map, this curve group is displayed after being vectorized, and each of the curve groups is displayed on a display screen based on interactive processing. Is added to the information indicating the height. Further, as described in Japanese Patent Application Laid-Open No. 50-928 and Japanese Patent Application Laid-Open No. 63-175974, there is also known an apparatus which optically reads the distribution of contour lines on a map and draws a sectional view. ing.

A method of adding height information to a vectorized curve group is to automatically recognize characters of an altitude, a water depth, an atmospheric pressure, or the like written in an original figure by character recognition. It is also possible to add a fully automatic method. However, at present, the following fully manual type or semi-manual type is adopted. In other words, in the fully manual method, the operator displays a vectorized curve group on the screen, and uses the pointing device such as a mouse to designate each curve on the display screen one by one while reading the height information read from the original drawing. Is added one by one by key input or the like. In the semi-manual type, the operator displays a vectorized curve group on the screen, manually inputs height information at both ends of an appropriate number of curve groups selected along the height direction, Is a method of automatically calculating and adding height information based on a manually input height step (elevation difference or the like).

[0004]

As described above, the addition of height information to a vectorized curve group is performed by an interactive input operation on a display screen. However, it is extremely difficult to inspect the presence or absence of such an input error on a display drawing in which the curve groups are complicated, and there is a problem that an input error cannot be easily detected. In addition, in the case of the completely manual method, erroneous height information may be added due to erroneous recognition of a numeral indicating an altitude or the like. However, there is a problem that it is difficult to check for such an error.

Accordingly, it is an object of the present invention to provide an inspection apparatus and an inspection method capable of quickly and surely determining whether or not height information has been erroneously input. Another object of the present invention is to make it possible to immediately shift to a correction work by re-inputting height information when an erroneous input is found as a result of the inspection, thereby realizing the efficiency of the correction work of contour data. An object of the present invention is to provide an editing device and an automatic drawing input system including the same.

[0006]

According to the present invention, there is provided an apparatus for inspecting contour data, comprising: a plan view display means for displaying a plan view including a curve group having contour lines and other height information on a display screen of a display device; , a line segment passing through any two points specified the curves being displayed on the display device on the display screen (cutting line)
In a cross-sectional view creating means for creating a cut cross-sectional view, displays the cross-sectional view of the already created, in the region of the cross section which is selected in a part of the display area <br/> plan view on the display screen And a cross-sectional display means.

[0007] Further, the above-mentioned sectional view display means is prepared.
A value obtained by dividing the display area of the sectional view into approximately four equal parts of the display area of the plan view display means.
Includes a line segment smaller than the area and passing through any two points
Display in one of the four corners of the display area
Is configured.

[0008]

When an inspection operator displays a plan view including a curve group having contour lines and other height information on a display device and designates any two points in the displayed plan view, a curve group such as contour lines is displayed. Is automatically created by cutting a line with a line segment connecting these two points. Creation of this cross-sectional view is easy by detecting the intersection of the specified cutting line and each curve, automatically calculating the distance between this intersection and the reference point, and reading the height information of each curve. Can be realized. The created sectional view is displayed in an area selected as a part of the display area of the plan view. If there is an input error in the information on the height of the curve, a unique point that lacks continuity with an adjacent point appears in the displayed cross-sectional view. By visually inspecting the presence or absence of such a unique point regarding continuity, it is possible to easily determine the presence or absence of a height information input error.

Further, according to the present invention, the sectional view display means is provided.
The created cross-sectional view is displayed in the display area of the plan view display
Any two points above the area smaller than the value divided into four
One of the four corners, up, down, left, and right, in the display area not including the line segment passing through
By displaying one on the other, errors found in the cross-section
Contour lines suspected of input are input quickly and reliably in the plan view
Yes, and if necessary, re-enter the correct height information
Configuration so that it can be performed consistently.
Have been.

[0010]

FIG. 4 is a block diagram showing an example of the entire configuration of an automatic drawing input system including a part of the inspection apparatus according to one embodiment of the present invention. Department. The drawing automatic input unit 10 includes an image scanner 11, a scanner interface unit 12, a data memory 13, and a vectorization processing unit 14, and displays and displays images.
The editing unit 20 includes a CPU 21, a data memory 22, a display control unit 23, a CRT 24, an input interface unit 25, a keyboard 26, and a mouse 27.

A map composed of a group of curves including height information such as contour lines is read as raster data by the image scanner 11 and stored in the data memory 13 via the scanner interface unit 12. In the following, for convenience of description, a drawing to be automatically input is referred to as a map. Vector processing unit 14, reads the saved raster Deta in the data memory, to separate the contours and characters and symbols data, for contours performs vectorization processing by thinning process and line, the data memory 13 To save. display·
The CPU 21 of the editing unit 20 operates the keyboard 2
According to the command input from step 6, the vectorized contour lines stored in the data memory 13 are read out and displayed on the CRT 24 via the display control unit 23.

The editing operator uses the mouse 27 to draw any contours contained in the automatically input map displayed on the CRT 24.
By inputting the altitude data read from the original map through the mouse 27 and the keyboard 26, an input operation of adding the altitude data to the contour line being displayed is performed. Input work of the altitude data, as described above, or fully manual method slide into entering the point by point elevation data manually for each contour, the altitude data based on the specified step for intermediate contours automatically It is performed by a semi-manual method of calculating and adding.

When the input of the altitude data is completed, the CP
Based on the dialog between U21 and the operator, the inspection for the presence / absence of erroneous input of the elevation data shown in the flowchart of FIG. 1 is started. First, the CPU 21 reads a map including vectorized contour lines stored in the data memory 13 in accordance with a command from the keyboard 26, and displays the map on the CRT 24 via the display control unit 23 (step S1). FIG. 5 shows an example of the map displayed on the CRT 24 in this manner. When the above-mentioned display is completed, the CPU 21 shifts to a waiting state in which two arbitrary points (points A and B) are designated by the operator (step S2). The operator operates the mouse 27 to specify arbitrary two points A and B on the displayed map in order to specify the range of the contour line to be inspected.

The CPU 21 includes two points A,
A line segment AB connecting B is created and displayed on the CRT 24 (step S3). FIG. 6 illustrates a state where the display of the line segment AB is added to the map of FIG. 5 in this manner. Subsequently, the CPU 21 creates a sectional view in which the contour line group in the map is cut by the line segment AB, and stores the sectional view in the data memory 22 (step S4). Finally, the CPU
21 is such that the display area of the sectional view does not overlap the line segment AB
Next, an area not including the line segment AB in the display area of the map is selected as a display area of the cross-sectional view, and the cross-sectional view stored in the data memory 22 is displayed here (step S5). FIG.
In this manner, a state in which a map and a cross-sectional view are mixedly displayed on the CRT 24 is illustrated.

In the sectional view of FIG. 7, the horizontal axis represents the distance between the intersection of the line segment AB and each contour line and the point A, and the vertical axis represents the elevation of each contour line. FIG. 7 illustrates a case where it is estimated that there is no erroneous input of the elevation data because the point indicating the elevation of each contour line changes smoothly over the adjacent contour lines. On the other hand, as illustrated in the cross-sectional view of FIG. 8, when there is a peculiar point in which the point indicating the elevation of a certain contour line changes rapidly from the adjacent contour line, the elevation data of this contour line It is determined that erroneous input is suspected. In this case, comparison with the map before automatic input is performed, and if it is determined that the input of the elevation data is erroneous, correct input of the elevation data is performed again for the contour line.

The details of the cross-sectional view creation process in step S4 of FIG. 1 will be described in more detail with reference to the flowchart of FIG. When the CPU 21 starts the sectional view creation process,
First, the first vectorized contour line included in the displayed map is selected (step S4a), and the intersection of the selected contour line and the line segment AB is searched (step S4b), and the presence or absence of such an intersection is determined. (Step S4c). CP
If an intersection exists, U21 calculates the distance between this intersection and point A, reads the elevation data added to the vectorized contour line, and cross-sections the pair of the calculated distance and the read elevation data. Data memory 2 as part of the figure data
2 (step S4d), and then proceeds to the next step S4e.

If there is no intersection, the CPU 21 immediately proceeds to step S4e, determines whether or not the next contour line exists, and if so, selects the next contour line data and returns to step S4b. The search for intersections for contour lines and the creation of cross-sectional view data when intersections exist are repeated. If the CPU 21 determines in step S4e that the next contour does not exist, that is, the search for the intersection and the creation of the cross-sectional data have been completed for all the contours, the cross-sectional view creation processing ends.

The contents of the sectional view display processing in step S5 of FIG. 1 will be described in more detail with reference to the flowchart of FIG. When the CPU 21 starts the sectional view display processing,
First, in the display area of the map (the plan view of the contour line group), the line segment A
A portion not including B is selected as a display area of the cross-sectional view (step S5a), and the prepared cross-sectional view is displayed in the selected display area (step S5b). As a result, FIG.
As shown in FIGS. 8 and 9, a part of the map including the cutting line AB and a cross-sectional view taken along the cutting line AB are simultaneously displayed on the CRT, and the plan view and the cross-sectional view are easily associated with each other.
As described above, displaying the cross-sectional view so as not to hide the cutting line AB in the plan view sets the area of the display area of the cross-sectional view to less than １ ／ of the area of the display area of the plan view and cuts the area. This can be surely realized by setting the display area of the sectional view to one of the left, right, upper and lower corners of the display area of the plan view in accordance with the set position of the line AB.

Subsequently, the CPU 21 selects the contour line closest to the cutting line AB (step S5c), and changes the display colors of the selected contour line and the point indicating the altitude in the sectional view corresponding to the contour line. Then, the elevation value of the contour line is displayed outside the display screen, for example, in a work area secured on the lower side (step S5d). For example, when the contour line group is displayed in blue, the CPU 21 changes only the display color of the selected contour line to yellow, and when the elevation point in the cross-sectional view is displayed in green, the CPU 21 changes to the selected contour line. Only the display color of the corresponding elevation point is changed to red.

After changing the display color and displaying the altitude value, the CPU 21 proceeds to the next step S5e, and shifts to a state of waiting for a step command input by the operator. When the worker inputs a stepping command using a keyboard or a mouse, the CPU 21 that has detected the command moves to step S5f, and selects a new contour line (to the point B side) adjacent to the selected contour line, The display color changed in step S5d for the elevation point corresponding to the contour line selected immediately before is returned to the original (step S5g), and the process returns to step S5d. In this way, every time the worker issues a stepping command, a new contour line and a corresponding elevation point are selected from point A to point B, and the newly selected contour line and the corresponding elevation point are colored. The change is repeated until an end command is detected in step S5i. By changing the display color, it becomes obvious to the operator which contour line in the plan view corresponds to which elevation point in the cross-sectional view.

As described above, the configuration in which the elevation point is displayed as a cross-sectional view has been exemplified. However, a configuration in which a bar-shaped figure having the elevation point as a tip may be displayed.

Further, the configuration in which the sectional view is displayed in a portion not including the cutting line in the display area of the plan view has been exemplified. However, when the display colors of the contour lines in the plan view and the corresponding elevation data in the sectional view are changed in synchronization, even if some contour lines corresponding to the peculiar elevation data found in the sectional view are in the plan view. If it is displayed in the middle, the corresponding contour line can be easily identified, and correct altitude data can be input again. Considering this point, a display mode in which a part of the cutting line in the plan view is hidden by the cross-sectional view can be allowed.

[0023]

As described in detail above, the contour line data inspection apparatus according to the present invention creates a cross-sectional view along a cutting line arbitrarily designated in a plan view such as a map, and combines this with the plan view. Since the display is configured, it is possible to easily check whether or not there is an erroneous input of the elevation data with respect to the contour line based on the presence or absence of a unique point that lacks continuity with the adjacent elevation point.

Further, according to the present invention, the sectional view display means is provided.
The created cross-sectional view is displayed in the display area of the plan view display
Any two points above the area smaller than the value divided into four
One of the four corners, up, down, left, and right, in the display area not including the line segment passing through
In this configuration, contour lines suspected of erroneous input found from the displayed cross-sectional view can be quickly and reliably identified in the plan view, and if necessary, correct height information is input again. Can be performed consistently. For this reason, there is an advantage that the efficiency of all operations required for the drawing input system of editing, inspection, and correction is greatly improved.

[Brief description of the drawings]

FIG. 1 is a flowchart illustrating an outline of an inspection process performed by an inspection apparatus for contour data according to an embodiment of the present invention.

FIG. 2 is a flowchart for explaining the contents of a cross-sectional view creation process in step S4 of FIG. 1;

FIG. 3 is a flowchart for explaining the contents of a sectional view display process in step S5 of FIG. 1;

FIG. 4 is a block diagram showing an overall configuration of an automatic drawing input system including the inspection apparatus of the embodiment as a part.

FIG. 5 is a diagram showing an example of a map including vectorized contours displayed on a display device constituting the inspection device of the embodiment.

FIG. 6 is a diagram showing an example of the map of FIG. 5 and a line segment AB specified therein;

FIG. 7 is a diagram showing an example of a screen on which a cross-sectional view and a plan view taken along line AB in FIG. 6 are simultaneously displayed.

FIG. 8 is a diagram showing an example of a screen on which a cross-sectional view and a plan view by a line segment AB in FIG. 6 are simultaneously displayed.

[Explanation of symbols]

 10 Automatic Drawing Input Unit 20 Display / Editing Unit 21 CPU 24 CRT 26 Keyboard 27 Mouse

Continuation of front page (56) References JP-A-2-146681 (JP, A) JP-A-3-129480 (JP, A) JP-A-64-66685 (JP, A) FACOM OS IV / X8 CONPAS (Contour Drawing Program), Fujitsu Limited, May 31, 1982, 2nd edition, p. 1,2,6,7,15-20,97,99,103,104 (58) Fields investigated (Int. Cl. ⁷ , DB name) G06T 11/60 G06F 17/50 G09B 29/00-29 / 14 G06T 1/00 CSDB (Japan Patent Office)

Claims (7)

(57) [Claims] 1. A plan view display means for displaying a plan view including a vectorized curve group having contour lines and other height information on a display screen of a display device; and displaying the displayed curve group on the display screen. A sectional view creating means for creating a sectional view cut by a line passing through any two specified points; and a sectional view created by the sectional view creating means in a display area of the plan view on the display screen. and a cross-sectional view displaying means for displaying in the display area of the selected cross-sectional view of a portion, the cross-sectional view displaying means, a cross-sectional view of the created, the
Less than a value obtained by dividing the display area of the plan view display means into approximately four equal parts
It is a small area and does not include a line segment passing through the above two arbitrary points
Inspection apparatus contour data characterizing that you display on one of the four corners of the vertical and horizontal of the display area. Wherein Oite to claim 1, wherein the plan view display means, the other curves of the curve when a curve of the curves in the plan view in the display is specified In addition to changing the display color to a different display color, the cross-sectional view display means changes the data indicating the corresponding height in the cross-sectional view to a display color different from that of another data group. apparatus. 3. The contour line data inspection apparatus according to claim 2 , wherein one of the curves in the curve group is designated sequentially along the line segment and in accordance with a stepping command. 4. Displaying a plan view including a vectorized curve group having contour lines and other height information on a display screen of a display device, and displaying the curve group being displayed on the display device on the display screen. and creating a cross-sectional view taken along a line through any two points specified, the cross-sectional view this created, Ho a display area of the display screen
The area smaller than the value obtained by equally dividing the area by four
Up, down, left, and right in the display area not including a line segment passing through a point
Displaying contour data at one of the corners . 5. Display means for displaying, on a display screen of a display device, a plan view including a vectorized curve group having contour lines and other height information, and displaying a curve group to which the height information is added. and a cross-sectional view creating means for creating a cross-sectional view taken along a line through any two points specified by the display screen, the cross-sectional view the cross-sectional view creating means is created, the display hand
An area smaller than the value obtained by substantially dividing the display area of the column into four
The display area not including a line segment passing through the arbitrary two points
A cross-sectional view display means for displaying at one of four corners of upper, lower, left and right, height display means for displaying the height information in association with the vectorized curve group, and a curve group being displayed as the plan view And a correcting means for correcting the height information added to the contour line data. 6. A plan view display means for displaying a plan view including a vectorized curve group on a display screen of a display device, and inputting height information to the curve group included in the displayed plan view. Editing means for adding the height information, and height display means for displaying the input height information in association with the curve group; and displaying the curve group to which the height information is added on the display screen. and a cross-sectional view creating means for creating a cross-sectional view taken along a line through any two points has a cross-sectional view of the cross section producing means, the plane figure
Area smaller than a value obtained by substantially dividing the display area of the indicating means into four equal parts
Wherein the display does not include a line segment passing through the arbitrary two points.
Cross-sectional view display means for displaying at one of four corners in the region, up, down, left, and right; and correction means for correcting height information added to the curve group being displayed as the plan view. Contour data editing device. 7. A drawing inputting / vectorizing means for optically reading a drawing including a curve group having contour lines and other height information and converting the drawing into a vector, and a display device for displaying a plan view including the vectorized curve group Means for displaying a plan view to be displayed on the display screen; editing means for adding height information to the group of curves included in the displayed plan view; and displaying the group of curves to which the height information is added on the display screen. any and a cross-sectional view creating means for creating a cross-sectional view taken along a line passing through two points, a cross-sectional view the cross-sectional view producing means, said planar chart specified in
Area smaller than a value obtained by substantially dividing the display area of the indicating means into four equal parts
Wherein the display does not include a line segment passing through the arbitrary two points.
Contour line data, comprising: a cross-sectional view display means for displaying at one of four corners of the area, up, down, left, and right; and correction means for correcting height information added to the curve group being displayed. Automatic input system.