KR19980071896A - Automatic correction of relative error of facilities between different numerical maps - Google Patents

Abstract

The present invention relates to a method for automatically correcting the relative error of facility location between different digital maps in the same region, and superimposes different types of digital maps input to a computer in connection with the operation of a drawing, which is an essential element for constructing a GIS. In case of using it, the method is to automatically correct the drawing to be used as the drawing based on the relative position error of the specific equipment represented on the map. By automatically calibrating the basic map, it can be used to assist in the database construction work of drawings to be used for GIS.How to derive matching pair points to automatically calibrate the equipment location. Method of estimating the corrected position of the sensor, and if the corrected equipment position is inappropriate, By developing a program using the present invention by implementing the method of analysis, analysis of statistical results, and statistical processing methods, the basic drawing database at each demand organization is effective in the current situation in which the construction of the geographic information system is active nationally. Can be utilized.

Description

Automatic correction of relative error of facilities between different numerical maps

The present invention relates to a method for automatically correcting the relative positional error of a specific facility represented on a map by superimposing different types of numerical maps input to a computer, and in particular, a geographic information system (hereinafter referred to as a GIS). It can be applied to the use of the national base map, which is digitized based on the topographic map, as a base map, and superimposing the management drawings of facilities such as electricity, telecommunications, gas, and water and sewage.

GIS integrates and processes geographic data that occupies location in space and related attribute data by using computer to collect, store, update, analyze, and output various types of information efficiently. As a form of information system, there are various fields of use such as automatic mapping, resource management, environmental management, urban planning, land planning, facility management, traffic control, etc., but it can be particularly useful for managing public facilities distributed over a large area.

In order to construct and use GIS for work, the establishment of spatial data database of the target area such as basic drawing input is an important prerequisite, and the cost for this takes up 60-80% of the total GIS investment.

Facility Management There are basic drawings used for GIS such as cadastral maps, topographical maps, etc., and facility management drawings such as power facility maps, underground burial plots, and communication facility diagrams. By inputting into a computer and superimposing management, facility management GIS becomes possible.

The basic drawings inputted to these computers have a problem in that relative position errors between drawings are inevitably generated when the subjects of creation, the timing of creation, and the method of creation are different from each other.

In this case, there is a problem in that the location of the facility must be properly moved based on the background drawing. To correct the location by manual operation, a lot of costs and manpower are required for each process such as output of actual drawing, field inspection, and input of facility location correction. The need for correction is inevitably raised.

As the utilization of the base drawing is not widely recognized among GIS demand organizations, the utility of automatic correction of facility location is not widely recognized. However, the government is promoting the production of national basic maps that have been quantified as national projects. It is expected that the national basic map will be used as the base map of the facility management GIS, and the necessity for automatic facility location correction is expected to be high.

Conventionally, when the position of the facility in the drawing needs to be corrected, it was carried out through non-automatic methods such as visual judgment and field inspection.

In order to solve the above problems, an object of the present invention is to provide a method for easily matching the position coordinates of the same facility between different types of numerical maps.

As a precondition for the present invention to be applied, two kinds of drawings to be corrected must be inputted to a computer in digital form having numerical values, that is, X and Y position coordinate values in the same coordinate system. When searching by designating a certain coordinate range, the two drawings should be loaded into the computer memory and displayed on the monitor. The drawing input, search, and display functions can be implemented in various ways by various commercially available software. It is a well known fact.

One of the two drawings to be corrected should be a base map that is a basis of relative position correction, such as a national base map, and the other drawing should be a facility diagram including a facility to be corrected.

If the equipment to be corrected is indicated on the ground drawing, the relative position of the equipment with respect to the contents of the ground drawing, such as roads and buildings, is considered to be accurate, but there may be errors such as missing equipment, misclassification, manufacturing lag, etc. Because of its large size, the degree of installation is always considered to be accurate. Base maps (eg, national base maps) are referred to as A and facility drawings (eg, telephone pole layouts) are referred to as B.

Under the above prerequisites, the automatic calibration for the equipment is processed through a certain sequence as shown in FIG. 1, but the processing is different when the equipment to be corrected in A is not displayed.

First, when facilities are marked, automatic correction is processed through four stages: preparation, pairing, point mapping, manual editing, and drawing storage.

The present invention relates to a method of automatically correcting a relative position error of a specific facility represented on a map on a base map by superimposing different types of numerical maps input to a computer for constructing a geographic information system (GIS). In this case, only the correction work area is read and superimposed from a database in which a base drawing as a reference for relative equipment position and a facility drawing to be corrected are stored in advance, and an error between the two drawings is determined by visual discrimination. Preparing to superimpose and display the position of one of the drawings in a predetermined direction so as to minimize the overlap; In order to find the equipments whose relative positions are identical between the two drawings, the separation distance between the equipments, the triangular similarity of the triangular composition with each equipment as a vertex, and the rotation angle of the triangle are set as the factor elements, and the predetermined conditions of the factor elements are set. A matched pair search process of searching for facility points by and setting each vertex of triangles within a predetermined condition as a matched pair; In the matching pair search process, for equipment matching pairs satisfying the factor condition, the position of each equipment in the equipment drawing is corrected by replacing the vertex coordinates of the triangle of the equipment drawing with the coordinates of the vertex of the corresponding base drawing triangle, and matching the pair. A matching pair position correcting process for classifying equipment not set to be ignored, and ignoring the equipment in the ground drawing and classifying the equipment in the equipment drawing as a missing point to be corrected; In the correction process, the triangular composition is reset using only the points of the matching pairs for which the position correction is performed, and the correction point is obtained by using the correlation between the vertices of the triangle and the missing points in the installation drawing, and the base drawing forms the matching pair with the correction points. A point matching process of finding a misclassification point of the and correcting the positions of the missing points; When the calibration point is located inside a building where it is obvious that it is incorrectly designated due to the surrounding conditions, located in the middle of the road, or located outside the sidewalk, the corresponding mapping point is detected and the color is displayed. Manual editing is performed, and manual editing and drawing saving are performed to store the completed drawings in the database.

1A and 1B are flowcharts of a digital map automatic correction process to which the present invention is applied;

2 is a structural diagram of similarity measurement between triangles matched by matching triangle configuration of the present invention;

3 is a structural diagram of a novel correction point estimation using three reference points of the present invention;

4a and 4b is a structural diagram of the location determination inside the building of the point mapped facilities of the present invention,

5 is a road center position determination structure diagram of a point mapped facility of the present invention;

6a and 6b is an example to which the present invention is applied, an illustration and an explanatory diagram of the electric pole superimposition of the national basic diagram and the distribution facility diagram based on the national basic diagram;

FIG. 7 is an example to which the present invention is applied, and after exploring and pairing the nearest facility by comparing the X and Y position coordinates of each facility, an explanatory diagram connected and displayed with a line;

8 is an example to which the present invention is applied, the explanatory diagram displayed on the screen after generating the dealer's triangle as a preparation step for measuring the degree of triangle matching;

9 is an explanatory diagram in which only the triangle passing through the correction factor is expressed as an example to which the present invention is applied;

FIG. 10 is an explanatory diagram in which the pre-correction position and the post-correction position are displayed by connecting lines with respect to the corrected facility points.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The preparation process retrieves only the correction work area from the drawing database DB (S1) in which A and B are stored (S2), reads it into memory, and displays them on the screen.

At this time, the colors of A and B facilities are different for the purpose of visual identification, and each of them is assigned an identifier (ID) which will be used for internal processing of the program in the order in which the facilities are read. .

In addition, it is visually checked whether there is an error of the parallel movement type (S3), and if there is an optional process, B is collectively moved in a predetermined direction (S4) to move to a position close to the equipment in A to improve the accuracy of correction.

Numerical maps used in GIS usually manage large areas as DBs, so the entire area is divided into squares according to the use situation, and then sequentially corrected and updated in the DB. There is a possibility that it will be missed when finally updating to DB out of search range after correction work.

To solve this problem, there is a search for a certain distance (10% or more of the straight line distance of the target area) in all directions than the set working target area, but the equipment included in the working target area and the out-of-range search equipment are separated and corrected by internal codes. When updating the database after the work, only the equipment within the scope of the initial target area is updated to prevent the loss of equipment.

As shown in FIG. 6A, the drawing used for the test is a drawing of a part of Busan Yeonje-gu, which corresponds to 0.75 A, where A is the national base map of 1: 1,000 scale, and B is the location reference of all the facilities in the distribution diagram. The drawing that inputs only the electric pole is used, and the coordinate system which is stored and managed in the DB uses the plane orthogonal system.

6A and 6B are exemplary diagrams and explanatory diagrams in which the poles of the national basic diagram and the distribution facility diagram are overlapped and developed based on the national basic map as an example to which the present invention is applied. Using the Jeonju (◆) of the National Map and the National Map, overlapping and retrieving different drawings of the same area, it was found that there is a difference in the location and quantity of the facilities.

In preparation, when two drawings of a search target region are overlapped and displayed, as shown in FIG. 6A. In this case, for example, a facility requiring a correction, the identification points are assigned to the points of the telephone pole, and the correction operation is performed with the coordinate values for the points. Here, the indications of the electric pole (●) of the power distribution equipment of FIG. 6B and the pole (◆) of the national basic map are shown for the purpose of differentiation in the drawings, and appear on the actual screen as the facility points of FIG. 6A, and distinguish the two figures. As a method, the colors are distinguished and displayed differently.

When this preparation step is completed, a matching pair search process, that is, a pairing process, is performed. The pairing process is a process of finding a facility having a relative position between two drawings by setting a predetermined condition. The matching pair is itself fixed in position correction, and the determined correction point is also used as a reference point for position correction of unpaired equipment.

For the equipment pairing process, first set a factor for designating an allowable condition (S5). The factor factor is the maximum allowable value of the separation distance, the similarity of the triangle, the angle of rotation of the triangle, and the like. It is a standard for determining

The equipment pairing process starts by finding and designating a pair of equipment closest to the separation distance in the state where two drawings overlap without any other constraints (S6). After finding the pair, the equipment ID number of each drawing is stored.

Since the pairs specified are only relatively close points, a separate inspection step is used to establish the equipment pair.

The first inspection step is to create a Delaunay triangulation, a common method of triangulation Irregular Network, with each facility in A and B as a vertex (S7), then combining A and B. Similarity is measured between the triangles (M8) by the formula shown in FIG. 2 (S8).

The method of similarity measurement focused on the fact that the triangles generated by the pairing facility were similar in shape, and formulated similarity between the two corresponding triangles.

In order to express similarity numerically, the joint condition of the triangle was used, and according to the joint condition, one of the two sides and the square angle or the length of the two sides and the three sides or the three sides can be selectively selected and compared.

Figure 2 is an example of the comparison between the two sides and the angle between the angles, and the weights for the angle and sides, but may be given differently if necessary.

here,

: Triangle in the ground drawing,

: Triangle in the equipment drawing,

a: angle of triangle vertex

e: length of triangle side

S: Similarity

w: weight

According to the formula, as the similarity is closer to 1, the two triangles are closer to congruence. On the contrary, when they are close to 0, the two triangles have different shapes, and the similarity tolerance, which is the basis for the selection, is based on the factors already specified.

7 is an example of applying the present invention, after comparing the X and Y position coordinates of each facility to find the nearest facility and pairing (Pairing), it is an explanatory diagram displayed by connecting the electric pole (●) and Using the Jeonju (◆) of the national basic map, the X and Y position coordinates of each facility were compared to find the nearest facility and paired.

The connection display with a line is a simple display for showing the matched pairs, and thus sets the equipment close to the matching distance as the matched pair. Subsequently, a triangle is formed as shown in FIG. 8 using facility points set as matching pairs. In this case, the facility points that do not form a matching pair are then corrected by estimating the correction point during the missing point correction operation.

8 is an example of applying the present invention, the explanatory diagram displayed on the screen after generating the dealer's triangle to measure the degree of triangle matching, the dotted line using the pole of the power distribution equipment (●) and the pole of the national basic diagram (◆) Dealer's triangle as a preparatory step for measuring the degree of triangularity by deploying the dealer's triangle made of poles of the paired power distribution equipment of the marking and the dealer's triangle made of poles of the national basic map of the paired solid line. After generating, it was displayed on the screen. In the drawing, the tangential marks indicate the dealer's triangles connecting the poles of the distribution facility diagram selected as the matching pair, and the solid lines indicate the dealer's triangles connecting the poles of the national base diagram selected as the matching pair.

The dealer's triangles formed by connecting the facility points having close distances to each other are satisfied within the allowable limits by the method of measuring the triangle similarity of the factor elements, that is, the triangle of the national basic map and the distribution diagram of the distribution system. By comparing the similarities of the triangles, only those triangles satisfying the tolerance of the joint condition are passed as the similarity satisfying condition.

9 is an explanatory diagram showing only a triangle passing through a correction factor as an example to which the present invention is applied, and a pole (●) that is determined as a reference point in the poles of the distribution system and a pole that is determined as the reference point in the poles of the national basic diagram (◆ ) And missed points (○) dropped from the reference point among the poles of the distribution system, and false points (◇) dropped from the reference point of the national basic map. The dealer's triangle made of poles and the dealer's triangle made of poles of the national basic map, which is the reference point for solid lines, represent only triangles that pass the correction factor.

The second inspection step checks whether the distance between the corresponding vertices among the matched triangles that passed the similarity test is within the specified factor (S9) and passes only if all three points are within the specified values.

The final inspection step checks whether the rotation angle difference between the two triangles is within a specified factor value (S10) and passes only when it is within a specified value.

When the above three setting criteria are satisfied, the position of the triangle is replaced by the coordinate value of A from the coordinate value of B, and the position is corrected, and it is used as the reference point for the position correction of the next stage of the unpaired equipment. do.

If the difference between the rotation angles of the two triangles is within the specified factor value or not within the range after the inspection (S10), it is determined whether the facility is a facility on the facility diagram (S11). Estimated as False Points (S12) Saved data (S13) and ignored in processing, in case of B, classified as Missing Points that must be corrected for location (S14) and stored in data (S15).

If the equipment to be corrected is not listed in A, or if it is determined that the pair equipment is insufficient, the reference point is manually input (S16) and the following processing after the input is performed in the same manner as the above process. .

If the difference between the rotation angles of the two triangles is within the specified factor value (S10), the reference point S16 is received and the reference point is set (S17).

After setting the reference point, the point mapping step generates a triangular composition (TIN) as the set reference point (S18), and receives the data of the set missing point (MP) to generate a corresponding triangle triangular composition (TIN) of the triangle including the missing point. (S19).

After setting the reference point through the facility pairing, perform the point mapping step (S20) and store the data (S21).

The processing in the point mapping step is to move the missing point of B to the proper position of A by the reference point set in the previous step, and after resetting the Delaunay triangulation with only the determined reference point 3 The missing point included in the triangle of B is calculated by the equation as shown in the following to calculate the phase relationship for each vertex of the triangle that contains it to obtain a relative correction point in the basic diagram based on this.

In the equation of Figure 3, X, Y is a coordinate value, Is a parameter for calibrating to the proper position, and new correction coordinate values are obtained through the ternary first-order simultaneous equation.

That is, the steps of obtaining the parameter values λ ₁ , λ ₂ and λ ₃ satisfying the following three equations are performed.

However, X _miss and Y _miss are X, Y coordinate values of missing point,

X _bi and Y _bi are X, Y coordinate values (i = 1, 2, 3) of three points constituting a triangle on the facility drawing.

Corrected coordinate values X _pm and Y _pm satisfying the parameters λ ₁ , λ ₂ and λ ₃ obtained in the above steps

X _pm and Y _pm are X and Y coordinate values of the correction point.

X _ai and Y _ai are obtained as X, Y coordinate values (i = 1, 2, 3) of three points constituting a triangle on the background drawing.

According to this formula, the closer of the three vertices, the more affected This is based on the empirical judgment that the separation form (direction, distance) of the near reference point has more influence than the separation form of the distant reference point.

As a result of obtaining the correction point through this point mapping process, the error point of A within the specified separation distance radius around the correction point is likely to be a matching pair. Therefore, the coordinate value of the correction point obtained here is replaced with the coordinate value of the error point.

After completing the above operation, the corrected drawing is displayed on the monitor (S22). At this time, the correction direction at the initial position (divided into 1, 2, 3, and 4 quadrants) to analyze the correction work of each facility. Expresses the distance and distance by facility, allowing visual confirmation.

Lastly, in the manual editing and drawing storage step, it is determined whether the facility is automatically corrected (S23), and it is clear that the facilities are incorrectly designated by the surrounding conditions, that is, when the correction point is located inside the building or at the center of the road. In addition, when located outside the sidewalk, the matching facility point is detected and color is displayed and displayed, and the user can manually calibrate the found facilities by judging the surrounding conditions.

FIG. 10 is an explanatory diagram of the present invention, and displays the pre-correction position and the post-correction position of equipment points on which correction work has been performed, and displays them on the screen for the operator to visually determine.

After the basic correction, a method of determining the location of the correction point in the building is shown in FIG. 4. As shown in FIG. 4, the boundary line of the building is converted into phase data having geometric information of the polygon, and then a line is drawn from the corrected point. If the number of crossings is counted, the number of crossings is counted, and if the number is odd, the number of crossings is determined to be located inside the building.

The method of determining whether a correction point is located at the center of a road or a sidewalk is obtained by determining a pair of line segments representing a road by distance and inclination. After that, the remaining 3/5 of the road boundaries corresponding to 1/5 of each road are regarded as the center of the road, and the equipment within this range is displayed. In FIG. 5, p2 represents a point-mapped location on a road of a calibrated facility, and p1 and p3 represent intersection points when connecting a vertical straight line to both road boundaries in a point-mapped facility. In this case, the center position determination range is shown in FIG. Is a calibrated facility If it falls within the range of, it is regarded as a point inside the road.

For roads that do not find a pair of roads, points within 2 meters from the centerline of the road are found, and if there are sidewalks, points outside the sidewalk are found.

It is judged whether or not to add manual correction of the equipment pair point having abnormal possession displayed through these operations (S24), and when performing correction, the position is supplemented by manual correction (S25) (S26), and then the worker By registering work management matters, such as work drawing information and various correction statistics, in the management DB (S27), and storing only the facilities included in the first work target area in the work result drawings, which are the result of the calibration work, and finally storing them in the DB (S28). ) We finish the correction work of search area.

In constructing GIS for the purpose of facility management, input of a base map to identify the relative location of the facilities is essential. It is a well-known fact that it is expensive to include and quantify.

Therefore, the demand organization that wants to build a geographic information system tends to use the input from other institutions as much as possible, rather than inputting the ground drawing by itself. to be.

In this situation, the government is pursuing the computerization of the floor plan across the country to improve the overlapping investment by inputting the floor plan for each institution at the national level, and the outcome is expected to be actively used by the demand organization.

When the computerized base drawing is introduced from the outside, the location of the equipment to be managed should be matched with the base drawing. In case of overlapping, relative position error between drawings is necessarily generated.

These relative position errors must be corrected to effectively utilize GIS, and manual correction requires a lot of cost and manpower for each process such as printing the actual drawing, checking on-site due diligence, and correcting input for equipment.

As a means to improve this, it is possible to expect not only to reduce costs but also to shorten the time required for GIS database construction by automatically calibrating the base drawings for equipment through this method. You can do it.

Claims (10)

A method of automatically correcting a relative position error of a specific facility represented on a map on a base map by superimposing different types of numerical maps inputted on a computer for constructing a geographic information system (GIS). Only the correction work area is read and superimposed from the database where the base drawings which are the reference of the position and the facility drawings to be corrected are stored in advance, and the errors between the two drawings are minimized by visually discriminating operations. The preparation process of collectively shifting the position of the drawings in a predetermined direction and displaying them, the separation distance between the facilities, and the triangular similarity of the triangular composition with each equipment as a vertex, Set the angle of rotation of the triangle to the factor element and set the installation points by the given conditions of the factor elements. Matching pair searching process for setting each vertex of triangles within a predetermined condition as a matching pair, and for equipment matching pairs satisfying a factor condition in the matching pair searching process, the vertex coordinates of the triangle of the equipment drawing correspond to the background. Correct the position of each equipment in the equipment drawing by replacing the vertex coordinates of the drawing triangle, classify the equipment that is not set as a matching pair, ignore the equipment in the ground drawing, and equipment in the equipment drawing as the missing points to be corrected. The triangular composition is reset using only the matching pair position correcting process, and the points of the matching pairs whose position correction is performed in the correcting process, and the correction point is obtained by using the correlation between the vertices of the triangle and the missing points of the installation drawing. Point that corrects the position of missing points by finding the misclassification points of the base drawing that match the correction points When a calibration point is located inside a building that is incorrectly designated due to the matching process and the automatic calibrated environment, located at the center of a road, or located outside of a sidewalk, color is detected after detecting the corresponding mapping point. A method of automatically correcting relative errors of facilities between different digital maps, comprising manual editing and drawing saving process of displaying and manually calibrating a user, and storing the completed drawings in a database. The method of claim 1, wherein the preparation process reads and superimposes only a correction work area from a drawing database in which a base drawing which is a reference of a relative facility position and a facility drawing to be corrected is stored in advance, and is visually determined. In order to minimize the error between the equipments of the two drawings by operation, the position of one drawing is collectively moved and displayed in a superimposed manner, but the base drawings and the equipment drawings are displayed in different colors for visual identification, and each individual equipment is distinguished. In order to recognize the equipment, each ID number to be used for the internal processing of the program is assigned, and the equipment is searched by searching for a certain distance in all directions from the set working area. When updating the drawing database after correction work by dividing the external search facilities by internal codes. A method for automatically correcting the relative error of facilities between different numerical maps, in which only the first target area equipment is updated to prevent the missing equipment at the edge of the search drawing. The method of claim 1, wherein the facility matching pair search process comprises: a distance between facilities in two drawings, a similarity of triangles with vertices of each facility in the two drawings, and a triangle to designate an allowance condition for the equipment matching pair search. The first step is to set the maximum allowable value such as the rotation angle as a factor element, find the pair of equipment closest to the separation distance in the overlapping state of the two drawings, designate it as the primary equipment matching pair, and store the equipment ID number for each drawing. In the second step and the facility distance set as the matching pair in the second step to the vertex as a vertex to form a dealer triangle by the triangular composition setting method, and measure the similarity between each triangle of the base drawing and the equipment drawing In the third step of passing the similarity check only those triangles within the triangle similarity tolerance set in the first step, and in the third step A fourth step of inspecting whether the distance between each corresponding vertex of the triangles that passed the similarity test is within the distance allowance range set in the first step, so that only triangles within all of the three vertices pass the distance test; For the triangles whose separation distances are within the allowable range at the three points passing through the fourth step, the condition is satisfied by checking whether the difference in the rotation angle of the two triangles is within the allowable range of the triangle rotation angle set in the first step. And performing a fifth step of setting the matching pairs only for the pairs of facilities. The third step of inspecting the similarity of the triangle is a dealer's triangle which is a method of setting a triangular sphere with the respective installation points as vertices for the installation points closest to each other in the overlapping state of the two drawings. And selecting one of the two sides and the four angles or the lengths of the two sides and the three sides by the triangular joint condition, and selecting the similarity of the triangles corresponding to each other in the two figures. Calculating the similarity by quantifying the joint conditions of the drawings, and checking whether the triangle similarity due to the joint condition is within the allowable range of the triangle similarity set by the factor element. Automatic correction of relative error. The method of claim 4, wherein the step of digitizing the joint condition to search for similarity, here, : Triangle in the ground drawing, : Triangle in the installation drawing, a: angle of triangle vertex e: length of triangle side S: Similarity w: weight Obtaining the similarity S for the corresponding triangles of the two figures by the perpendicular to the relative error autocorrection method of different numerical map equipment. The coordinate matching position of claim 1, wherein the matching pair position correction process uses a coordinate value of a base drawing as a vertex coordinate value of a facility drawing for a triangle that satisfies the allowable conditions of triangle similarity, separation distance, and triangle rotation angle in the matching pair setting process. Correcting the location of the facility in the facility drawing, setting the position-matched matching pairs as reference values for the next step location correction of the unmatched facility, and among the unmatched facilities The equipment points are classified into misclassification points, not equipments to be corrected, and among the equipment that is not matched, the equipments of the equipment drawings are classified as missing points that must be corrected for location. If no installation points exist or there are not enough facilities, enter the reference points manually. Relative error automatic calibration method of the installation between different levels, characterized in that the map is performed. The method of claim 1, wherein the point matching process comprises: resetting a triangular composition using only points of matching pairs for which position correction has been performed during the facility correction process, and missing points of the facility drawing missing during the facility correction process. And obtaining a relative correction point using the phase relationship between the vertices of the triangle including the missing point, and finding the misclassification point of the background drawing within a specified separation distance around the correction point to find the coordinate value of the correction point. Correcting the missing point by substituting the coordinate value of the misclassifying point, and displaying the result on the screen by expressing the correction direction and distance for each facility at the initial position so that the corrected result can be visually analyzed. A method for automatically correcting relative errors of different numerical map facilities, characterized in that it comprises a. The method of claim 7, wherein the method for obtaining correction points for the missing points of the point matching process comprises: calculating parameter values λ ₁ , λ ₂ , and λ ₃ satisfying the following three equations; X _miss and Y _miss are X, Y coordinate values of missing point, X _bi , Y _bi are X, Y coordinate values (i = 1, 2, 3) of three points constituting a triangle on the facility drawing. The correction coordinate values X _pm and Y _pm satisfying the parameters λ ₁ , λ ₂ and λ ₃ are (Where X _pm and Y _pm are the X, Y coordinate values of the correction point, X _ai , Y _ai are the X, Y coordinate values (i = 1, 2, 3) of the three points constituting the triangle on the ground plane) A method for automatically correcting the relative errors of different numerical mapping facilities, characterized by performing a step of obtaining. The method of claim 1, wherein the method of determining whether a correction point is located in the building during the manual editing and drawing storage is performed by converting a building boundary into phase data having geometrical information of a polygon, and then shifting from the corrected point to one side. A line is extended to count the number of intersections with the line segments of the polygon.If the number of counts is an odd number, it is determined that the correction point exists inside the building. A method for automatically correcting relative errors of different numerical map facilities. The method of claim 1, wherein the method of determining whether a correction point is located at a center or a sidewalk of the road during the manual editing and drawing storage is performed by determining pairs of respective line segments representing a road by distance and inclination. After dividing the total width of the road in which the road is located, the remaining 3/5 of each road boundary line corresponding to 1/5 is regarded as the center of the road, and the equipment falling within this range is identified as the facility located in the center of the road. For roads that do not find a line segment representing the road, a correction point within a predetermined distance from the center line of the road is identified and displayed as a facility located in the center of the road. A method for automatically correcting relative errors of different numerical mapping facilities, which finds and displays points.