JPS63282575A - Read processor for map coordinate - Google Patents

Abstract

PURPOSE:To correct an artificial error and to perform accurate arithmetic operation by providing a rounding processing means which rounds plural coordinate values into one coordinate value when the different coordinate values are recognized by pointing out one point on a map plurally. CONSTITUTION:When finding plural X and Y coordinate values within a specific value range, a personal computer 7 corrects the mean value of those coordinate values as a new coordinate value, and confirms automatically by inspection that there is neither a zero-length segment nor an open segment segments stored according to the corrected coordinate values. Further, when a defect is detected as a result of the inspection, the personal computer 7 is varied a specific value to another specific value and it is conformed again automatically that there is neither the zero-length segment nor open segment among segments obtained by varying the specific value to another specific value is carried out. Thus, a personal computer 7 of each control table 6 is stored with respective coordinate values of the non-defective states of the segments in its storage device 8.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention inputs coordinate values obtained by manually pointing out points on a survey map into a host information processing device, and calculates area and other operations. It relates to a device that performs processing.

The present invention is suitable for use in calculation processing of cadastral maps.

〔overview〕

The present invention is a map coordinate reading and processing device that reads the XY coordinates of a point on a map that is manually pointed out, processes it, inputs it to a host information processing device, and performs area calculations and other operations. When different coordinate values are recognized by pointing out a point on a map multiple times, by providing a processing means that rounds these into a single coordinate value, correcting human errors and performing accurate calculations. It has been made possible to do so.

[Conventional technology]

A worker manually points out a predetermined point on the actual measurement map,
A map coordinate reading processing device is known that converts the coordinate value of this point into a digital value and inputs this information to a host device for performing arithmetic processing such as calculating the area within a predetermined section.

When using this device to input data for a plot of land on a surveyed map of a cadastral map, for example, the worker clocks each handwritten point starting from the one with the smallest X coordinate value among the handwritten points surrounding the plot. If you point out the points around you one after another, the coordinate values of each of these points will be input. At this time, the existence of a line segment (boundary line) having both ends of the two points between the two points that are sequentially input is recognized and input. When the worker reads the last writing point of the section and then reads the starting point again, the work on this section is completed. At this time, the reading processing device stores the coordinate values of each read point and the presence or absence of a line segment between these two adjacent points.

At this time, points belonging to a plurality of sections, which are the starting point and the writing point of one section, are always pointed out more than once and stored as digital values. Since this pointing is done manually, the digital values pointed out more than once are different from each other. That is, if the accuracy of identification as a digital value is improved, what should originally be the same point will be input as a different point. As a result, the section that should originally be surrounded by closed line segments is now open, that is, there are edges with no line segments.
Alternatively, an intersection of line segments that does not originally exist may occur. Therefore, even if you enter the same information into the host device,
The upper level device cannot calculate the area.

For this reason, in the past, a certain tolerance was set, and the value read the first time the same point was pointed out was used as the reference value, and if the value read the next time it was pointed out was within that tolerance, it was considered the same point. If this occurred, the coordinate values of the points were artificially corrected.

[Problem that the invention seeks to solve]

With this method, two points that are naturally close to each other may be mistakenly recognized as the same point, and there is the problem that the sum of the areas of each section of one map is not equal to the area of one map. Sometimes it happened. Furthermore, since correction requires manual intervention, there is a drawback that the number of man-hours required to resolve this inconvenience increases.

SUMMARY OF THE INVENTION An object of the present invention is to solve these drawbacks and provide a map coordinate reading/processing device that is as similar as possible to a surveyed map, accurately calculates area, and requires significantly less manual inspection man-hours.

[Means for solving problems]

The present invention provides a planar digitizer means for reading the XY coordinates of a point on the map that is placed on a map created by surveying and manually pointed out, and a storage device for inputting and temporarily storing the XY coordinate values read by this means. and a computer device that controls this storage device and sends the data to be outputted from this storage device to a higher-level device, wherein the computer device has one image stored in the storage device. Find a plurality of coordinate values whose X and Y coordinates are each within a predetermined value among a large number of coordinate values on a map of means for storing the coordinates again in this means, and that there is no line segment whose length is zero, and that there is no line segment formed by the coordinates stored again in this means, and that a closed line segment is open.
The present invention is characterized in that it includes means for checking that a portion that becomes a line segment does not occur.

[For production]

When there are multiple coordinate values within a predetermined value for the X and Y coordinates, these coordinate values are corrected to one coordinate value.

As a result of this modification, it is automatically checked whether there are any line segments that become zero or sections where line segments become open.

As a result of the inspection, if a line segment is found to be zero, the predetermined value is automatically reduced. Also, if there are open line segments, the predetermined value is automatically increased.

As a result, the inspection is automatically attempted again and ends when no defects are found in the inspection results.

As a result, a single point that was originally recognized as a plurality of coordinate values is stored as a single coordinate value.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings.

FIG. 1 shows a block diagram of a map coordinate reading processing device according to the present invention.

In FIG. 1, a measured diagram 1 on which necessary items are written is placed on a flat digitizer 2. As shown in FIG. This flat digitizer 2
The operation panel 3 and the pedal switch 5, through which the operator performs an input operation while aiming at a writing point, are connected by predetermined wiring, respectively. Multiple (three in this example) flat digitizers 2
The outputs are sent to the control console 6 via cables B+, Bz, and Bs. The control console 6 is a personal computer 7
and a storage device 8, and is connected to a large computer 9 via a cable Bs+.

Each of the plurality of control units 6 is connected to a large-sized computer 9 via cables B1, B1, etc., respectively.

This large computer 9 includes an input device 10 and a printer 1.
1 and a plurality of XY recorders 12.

In response to instructions from the input device 10, the large-sized computer 9 reads the contents of the storage device 8 of each control stand 6 at appropriate times, calculates the area of the required section of each actual measurement map 1, and prints and outputs this using the printer 11. or XY recorder 1
2 to automatically draw a cadastral map of the required portion.

In FIG. 2, when the operator on the workbench 4 places the actual measurement diagram 1 having the partial view shown in FIG. If an instruction is given to input the origin on the panel 3 and the pedal switch 5 is pressed, this point will be stored as the origin of the coordinates.

The XY coordinate values of points P and -P, which are the calculation points of the plot with lot number N1, are sequentially stored in the storage device 8 via the personal computer 7 along the line segment connecting these points (i.e., the boundary line of lot number N1). read. In this example, the points P, ~P.

It is programmed to take the one with the smallest X-coordinate value as the starting point and read sequentially in a clockwise direction (in the direction of each arrow shown in FIG. 3). The operator continuously performs reading and pointing operations on the operation panel 3. In the section with lot number N1, the rightmost point PI (where the X coordinate value is the smallest) is first pointed out with the sight 2A, and the pedal switch 5 is pressed. Then point P as shown by the arrow,
, P, point out each point in the order of --------・−・−・,
The pedal switch 5 is pressed each time. As a result, the personal computer 7 stores the digital values of the XY coordinates of each point in the storage device 8.

The personal computer 7 of the control board 6 constantly monitors the state of this calculation, and during this time, for example, when pointing out point P3, it recognizes that there are line segments P2 and B3 between it and the point P pointed out immediately before. Then, it is stored in the storage device 8. Furthermore, this lot number N.

Point out each point, return from point P to point PI, and return to lot number Nl.
When the operator completes the pointing operation, the worker moves to the next lot number N2
Input into the operation panel 3. When point P9 is then pointed out, personal computer 7 recognizes that there is no line segment between points P and stores this.

In the above calculation, since each point is manually pointed out by a worker, pointing errors occur. For example, in FIG. 3, points Pt and Ps, which are points on the common boundary line of a plurality of sections, and points PI, which are starting points, are pointed out at least twice.

At this time, the personal computer 7 reads a point that should be the same point as two or more different coordinate values due to the above-mentioned pointing error.

The feature of the present invention is that when a plurality of sets of X and Y coordinate values are found within a predetermined value, the personal computer 7 calculates a common average value of these and updates it. Based on the corrected coordinate values, it is automatically checked whether or not the stored line segment has zero length or is open.

Furthermore, when a defect is detected as a result of this inspection, the personal computer 7 changes the predetermined value to another predetermined value and re-memorizes the line segments with zero length and open segments. The purpose is to automatically check again to see if there are any.

These inspections will continue until there are no defects in the results.

In this way, the personal computer 7 of each control stand 6 stores in its storage device 8 each coordinate value when there is no defective state of the line segment. Therefore, the large computer 9 can correctly calculate the area of the portion surrounded by the line segment.

Next, when a plurality of X and Y coordinate values are found within a predetermined value, a correction operation for finding a common average value and correcting it as a new coordinate value will be described in more detail.

The actual measurement diagram is mainly used with dimensions of 400 mm in width and 300 mm in height. Each of these is divided by a mesh divided into units of 00lfl, and this is called a string diagram. Figure 4 shows 1500 units in the X coordinate and 160 units in the Y coordinate.
A partial string diagram in the vicinity of 0 units is shown.

In Fig. 4, even if the operator points out the positions of each white circle, which is an analog value, on the actual measurement diagram, these do not correspond to their respective digital values as the positions of p3, p2, p3, and p4 on the string line, as shown by the arrows. It is read as a coordinate value.

Point out the same point, for example, four times, and make the points p, ~
Each of the four sets of coordinate values (xl.

y+), (x,, y3), (xt, y+), (xz
.

Here, when the coordinate values of point p are (X+m, y,), 1""(XsX+)"()'s-3't)"+
(xm-xt)"+(yw+-y3)"+ (X++
+ Xz)”+(y+* y+)”+ (Xs
xx)”+(ys yz)”! d f (Il)/d x, = Od f (ffi
)/dy, −0, and find a point p with (Xs, 7+e).

These coordinate values x1, y are the most probable point p1 of the above four sets of coordinate values.
Then, the corrected coordinate values of the same point are obtained.

Next, a detailed description will be given of an inspection device that automatically inspects whether or not the stored line segments have zero length or are open. In other words, the coordinate values corrected above are read out from the memory circuit, and it is determined whether or not the length of the line segment is zero among the two points where the line segment is considered to be present, and whether the line segment is open or not. Check to see if there are any partitions. If these are present, it is determined to be defective.

In this inspection operation, if a defect is detected in which the length of the line segment between two points is zero, when the coordinate values of the two points shown in Fig. 5 are dl and d2, respectively, This is because the coordinate values were within the predetermined value of the 3-unit mesh (within the range indicated by the downward diagonal line in FIG. 5), so they were corrected as the same coordinate values in the above correction operation. Therefore, if you reduce the predetermined value by 2 units (within the diagonal line in Figure 5) and perform the correction operation again, the coordinate values d and Sd will be recognized as different points, so the line The length of minutes is no longer zero.

Next, if a defect occurs where it is determined that there is a section where the line segment is open, when the same point is originally pointed out twice, the coordinate values of each specified position will be d and d4 shown in Figure 6. This is the case. In this case, the predetermined value is 2 unit mesh (6th
If the coordinates are within the diagonal lined area shown in the figure), they will be recognized as different coordinate values in the correction operation. Therefore, in such a case, if you increase the predetermined value and mesh it by 3 units (the area indicated by the diagonal line at the bottom right in Figure 6), and then correct the average value again, they will be the same. Since the coordinate values are corrected, there will be no open line segments.

In this way, if the area is calculated by a large computer after such rounding is completed, the area will be calculated with high precision without becoming inoperable.

FIG. 7 is a flowchart of the calculation method of this embodiment.

[Effects of the Invention] As explained above, according to the present invention, incorrect coordinate values due to human pointing errors when pointing out map coordinates manually are corrected, and line segments between each line are corrected. Arithmetic processing is not performed while the state remains unchanged. Moreover, this correction process is performed automatically without manual intervention.

Therefore, in the case of a cadastral map, etc., the area of a required section can be calculated accurately and quickly, and the number of man-hours required to inspect the output results can be significantly reduced.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention. FIG. 2 is a schematic explanatory diagram of the apparatus of the above embodiment. Figure 3 is a partial diagram of the actual measurement diagram. FIG. 4 is an explanatory diagram (1) using a string diagram. FIG. 5 is an explanatory diagram (2) using a string diagram. FIG. 6 is an explanatory diagram (3) using a string diagram. FIG. 7 is a flowchart of this embodiment. 1... Actual measurement diagram, 2... Flat digitizer, 2A...
Sight, 3... Operation panel, 4... Workbench, 5... Pedal switch, 6... Control stand, 7... Personal computer, 8... Storage device, 9... Large size Computer, 10... Input device, 11... Printer, 12
...XY recorder, B3, B! , Bat, B1...
・Cable, 0...Origin of actual measurement diagram, N l-N?・
...Plot number, P+ "'Ps, p+~p4...Point, d
, -d, . . . coordinate value of a point, p, . . . most probable point. Bird 2 Partial diagram of the mouth measurement diagram Figure 3 Figure 4 Explanatory diagram using a string diagram (1) - ChiX Figure 5 Explanatory diagram using a string diagram (2) Explanatory diagram using a string diagram (3) Figure 6 Flowchart of Example - Figure 17

Claims (1)

[Claims] (1) Plane digitizer means (2, 3, 5) for reading the XY coordinates of points on the map that are manually pointed out on a map created by surveying; A map coordinate system comprising a storage device (8) for inputting and temporarily storing data, and a computer device (7) for controlling this storage device and sending data to be outputted from this storage device to a host device (9 to 12). In the reading processing device, the computer device detects a plurality of coordinate values whose X coordinates and Y coordinates are each within a predetermined value among a large number of coordinate values on one map stored in the storage device. means for correcting the coordinate values of to a common new coordinate value and storing it again in the storage device, and that there is no line segment formed by the coordinates stored again in this means whose length is zero. and means for inspecting that a closed line segment does not become an open line segment.