JPS60127412A - Correcting method of surveyed map - Google Patents

Abstract

PURPOSE:To correct the coordinate-values of a measured map accurately in a short time and to make map-connection perfect, by connecting two corrected lot boundary points, which are located within the shortest distances from neighboring map-frame lines by a straight line. CONSTITUTION:Originally, a line, which is surrounded by common coordinate- axes, is a mathematical, theoretical, temporary line as a matter of fact. It is considered that a lot is conveniently divided by map-frame lines in preparing a map. The points, which are closest to the respective map-frame lines, are connected by the lots to be connected. The points, which intersect the map-frame lines, are made to be the mutual points. The corrected measuring points 10 and 10', 11 and 11' and 12 and 12' are connected. Thus new lot boundary lines 20, 21 and 22 are set. Then, the coordinate-axes are all obtained on the theoretical map-frame lines. An area of 120,000mm.<2> is assured on a unit of a plane table. The neighboring points become common to each other, and map connection can be made perfect.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field to which the Invention Pertains) The present invention relates to a method for correcting a survey map. In particular, it relates to a method for correcting a survey map when a calculus line extends across two drawings.

[Background of the invention]

The creation of a survey map involves determining the survey points based on the root point, angle, and distance from which survey values obtained through field survey can be requested, and plotting and drawing them on a single plane divided by public coordinate axes. has been done.

In order to correct errors in the drawn survey maps, a measuring device is used to measure the points of each army and the points of each army that touch on the map lines as calculation points on the map.

As a result, the writing point will always be measured more than once, and it is extremely rare for the measured values at the same location to match.To avoid this discrepancy, the optimal coordinate values are determined by the least squares method. "Rounding process" is performed, and then [
The area of each army is calculated and reproduced from the original drawing data base, which guarantees consistency between the area value of each drawing and its measured coordinate values by performing ``line segment inspection'' of the handwritten lines between the calculated points obtained by ``rounding processing.'' Currently, the revised drawings have been completed. With this current creation method, since processing is done on a drawing-by-drawing basis, the connections with adjacent drawings on the top, bottom, left, and right are not perfect.
When there are calligraphy lines across two drawings, it requires a huge amount of manpower and time to join the mismatched drawings, and if they are straightened, their reproducibility will be completely lost. As of now, it has been left abandoned. Therefore, the area burial is not related to adjacent drawings, and as shown in Figure 1,
, 1b, and 1c are the ends 2a of the stroke lines of the survey map 2.
, 2b and 2c, calculations are performed individually for poor connections that do not match.

The inventor believes that the lines surrounded by the public coordinate axes (map lines) are just mathematical and logical temporary lines, and that connections between drawings can be made by connecting survey points close to the map lines with straight lines. The present invention was completed by paying attention to the fact that the above problem can be resolved in one step.

[Purpose of the invention]

In creating a survey map, the present invention automatically corrects artificial connection differences on map contour lines for each drawing based on logical grounds when a calculation line spans two drawings, and It is an object of the present invention to provide a method for correcting a survey drawing by which coordinate values on a contour line can be corrected accurately and in a short time without affecting the coordinate values and area.

[Features of the invention]

The present invention is based on the map root point determined by survey on a plane divided by public coordinate axes, and the angle and distance from the map root point. Read the coordinates of the point and directly connect this calculation point to the lower bound ゎ;
), and calculate the area of the above-mentioned points and the above-mentioned areas so that the sum of the areas of the above-mentioned sections on the above-mentioned one plane is equal to the area of the one plane divided by the above-mentioned public coordinate axes. In the method of correcting a survey map by correcting the position of a stroke line, when the stroke line is a line segment that spans two planes of adjacent sections, the stroke lines that straddle are in different planes and the adjacent lines are in different planes. The system is characterized in that the contour coordinate values of the survey map can be corrected accurately in a short time by performing correction by connecting with a straight line between the two correction points whose positions are the closest to the division.

[Explanation based on examples]

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

FIG. 2 is an explanatory diagram of the correction method according to the present invention.

Survey maps 1 and 2 are made by connecting the points found during the survey with a straight line, drawing a line, and then dividing each point according to the sum of the area of each army and the public coordinate axis. The plot area and the theoretical area of the plane are individually corrected and created.

When these survey maps 1 and 2 are placed adjacent to each other, the ends 1a, b, and 1c of the stroke lines on the contour line of survey map 1 and the ends 2a, 2b, and 2c of the stroke lines on the contour line of survey map 2 are They do not necessarily match, and there is no deviation between them, but an artificial connection difference causes M and N.

Originally, the lines surrounded by the public coordinate axes are just temporary lines based on mathematical logic, and the brushes are considered to be divided by outline lines for the convenience of drawing. The corrected survey points 10 and 10' are connected by connecting the points closest to the contour lines and using the points that cross the map contour lines as mutual points to be joined.
If you combine 11 and 11' and 12 and 12' and set new stroke lines 20, 21 and 22, all coordinates will be found on the theoretical contour line, so there will always be 1 in each flat plate.
The area of 20000m++2 is guaranteed, and the adjacent points are common to each other, and the drawing connection can be completed.

[Effects of the Invention] As explained above, according to the present invention, the deviation of a stroke line extending over the contour line of an adjacent survey map can be corrected very easily without reducing the measurement accuracy of the area.
As a result, the time required for correction can be significantly reduced, and there are excellent effects such as the ability to eliminate misalignment of each calculation line, which was left unattended at present, by copying the drawing.

[Brief explanation of drawings]

Figure 1 is a diagram showing the deviation that occurs when survey maps are placed adjacent to each other. FIG. 2 is an explanatory diagram of the correction method according to the present invention. ■, 2...Survey map, 10.10' 11.11
'12.12',... Corrected written score, 20.2
I, 22... Calculation line. Patent applicant: Rikujisha Co., Ltd. Agent: Naotaka Ide, patent attorney

Claims (1)

[Claims] (1) Read the coordinates of a handwritten point on a survey map drawn based on the map root point determined by survey on a plane divided by public coordinate axes, and the angle and distance from the map root point, and read this hand calculation. Calculate the area of the plots surrounded by lines that directly connect the points, so that the sum of the areas of the plots on the plane is equal to the area of the plane divided by the public coordinate axes. In the method of correcting the survey map by correcting the positions of the above-mentioned stroke points and the above-mentioned stroke lines, when the above-mentioned stroke lines are line segments that span two planes of adjacent sections, the stroke lines that straddle each are on different planes. A method for correcting a survey map, characterized in that correction is performed by connecting with a straight line between two corrected calculation points that are located within the map and are closest to the adjacent map line.