KR20230116241A - Method for improving the precision of map - Google Patents

Abstract

The present invention is a technical field related to a method for checking and correcting the performance of a digital topographic map by geodetic surveying. Since it can be corrected without omission, the reliability of the digital map can be secured, and manpower and cost can be saved.

Description

A method for ensuring the accuracy of digital topographic maps in geodetic surveys {METHOD FOR IMPROVING THE PRECISION OF MAP}

The present invention relates to a method for securing the accuracy of digital topographic maps in geodetic survey, and more specifically, to identify errors such as reference points, symbols, road centerlines, distances, etc. And, if it is inappropriate, it relates to a method for securing the accuracy of a digital topographic map of geodetic survey, which can prevent problems early by correcting them and improve the reliability of the finally produced digital topographic map.

Digital topographic maps are largely constructed in the steps of control point survey, aerial photography and drawing, on-site survey and supplementary survey, in-place editing and drawing production, and the above process is performed in accordance with digital map production regulations.

At this time, the subject who discloses and manages the digital topographic map inspects omissions and errors in the production of the digital topographic map in order to publicize the digital topographic map. It is based on manual inspection, and if the inspection target is extensive or scattered, the on-site inspection method by direct inspection using a road view such as a web map, and the second method is to correct omissions and errors reflected by the on-site inspection. There is a method for checking and correcting digital topographic maps

In the case of the first on-site inspection method, various correction and supplement systems are being developed to improve efficiency by reducing errors in the frequency and scope of on-site inspection. However, in the case of showing items corrected and supplemented by on-site inspection on a digital topographic map, it is essential to correct and supplement the drawing again to meet the guidelines, and it is better to carry out the correction and supplement work manually by looking at paper drawings, survey ledgers, etc. Common. In this process, errors such as errors between reference points and vertices, distance inconsistency, code symbol inconsistency, overlapping objects, and road centerline inconsistency may occur, resulting in reduced inspection accuracy.

Therefore, there is a need for a new method that can secure the reliability of digital topographic maps by geodetic surveying and further suggest the appropriateness of supplementary directions.

Registered Patent No. 10-2182654

One object of the present invention is to provide a method for securing the accuracy of a digital topographic map of geodetic survey, which can secure the reliability of a digital topographic map by reflecting changes made in the process of measurement by geodetic survey and on-site inspection.

In order to solve the above-mentioned problems, we provide a method for verifying performance from reference point coordinates obtained through geodetic surveying and on-site inspection, and verifying and correcting digital topographic map performance by geodetic surveying to correct it. According to an embodiment of the present invention, a digital topographic map performance inspection and correction method by geodetic surveying includes: (a) a digital topographic map storage step of uploading a digital topographic map created by geodetic surveying and field inspection; (b) a coordinate scattering step of inputting the original coordinates marked on the stored digital topographic map on a CAD; (c) a spot check step of checking the spot of the coordinates input on the CAD; (d) a layer control step of forming a layer according to the checked dots and checking whether a connection distance of the layer formed according to the checked dots corresponds to the specified distance; (e) a symbol conversion step of converting symbols for each coordinate after layer control is completed; (f) a vertical line correction step of correcting the vertical lines between the formed layers; (g) symbol rotation step displayed on the layer after vertical line correction; (h) a center setting step of setting a center after the symbol conversion; and (i) searching for and correcting overlapping objects among the dots, layers, and symbols; Including, but if the connection distance of the layer exceeds the specified distance in the (d) layer control step, a dot is added to inspect (c) to (i) again, and the center setting in the (f) center setting step It is characterized in that (d) to (i) are inspected again.

A method for securing the accuracy of a digital topographic map of geodetic surveying according to an example of the present invention is an error occurrence between a reference point and a vertex of a digital topographic map recorded by field measurement and field inspection, distance inconsistency, code symbol inconsistency, occurrence of overlapping objects, road centerline By inspecting errors such as discrepancies and correcting them to meet the guidelines, the reliability of field measurements and field inspections that have already been performed can be secured.

1 is a schematic flowchart of a method for securing the accuracy of a digital topographical map of geodetic surveying according to an embodiment of the present invention.
2 is an example of a guide shown on a digital topographical map.
3 is an example in which dots are corrected by a method for ensuring accuracy of a digital topographic map according to an embodiment of the present invention.
4 is an example in which a symbol is corrected by a method for ensuring the accuracy of a digital topographical map of geodetic surveying according to an embodiment of the present invention.
5 is an example in which a layer is corrected by the method for securing the accuracy of a digital topographic map of geodetic survey according to an embodiment of the present invention.
6 is an example of rotation of a symbol by a method for securing accuracy of a digital topographic map according to an embodiment of the present invention.
7 is an example in which a center is set by a method for ensuring accuracy of a digital topographic map according to an embodiment of the present invention.
It is revealed that the accompanying drawings are illustrated as references for understanding the technical idea of the present invention, and thereby the scope of the present invention is not limited thereto.

In describing the present invention, a detailed description thereof will be omitted if it is determined that a related known function may unnecessarily obscure the subject matter of the present invention as it is obvious to those skilled in the art.

Hereinafter, a method for securing the accuracy of a digital topographic map of geodetic surveying according to an embodiment of the present invention (hereinafter, referred to as "method for securing the accuracy of a digital topographic map") will be described.

The digital topographic map accuracy assurance method of the present invention refers to a method for securing accuracy by inspecting and correcting a digital topographic map produced through reference point coordinates obtained through geodetic survey and field inspection. Hereinafter, it is revealed that each of the following steps is performed by a digital topographical map correction module.

1 is a schematic flowchart of a method for securing the accuracy of a digital topographical map of geodetic survey according to an embodiment of the present invention, and FIG. 2 is an example of guidelines shown in a digital topographical map.

3 is an example in which dots are corrected by a method for securing accuracy on a digital topographic map according to an embodiment of the present invention, and FIG. 4 is an example in which dots are corrected by a method for securing accuracy on a digital topographic map of geodetic survey according to an embodiment of the present invention. an example of being 5 is an example in which a layer is corrected by a method for securing accuracy of a digital topographic map of geodetic survey according to an embodiment of the present invention, and FIG. 6 is an example of rotation of a symbol by a method for securing accuracy of a digital topographic map according to an embodiment of the present invention. FIG. 7 is an example in which a center is set by a method for ensuring accuracy of a digital topographic map according to an embodiment of the present invention.

First, in the case of geodetic survey, the operator directly proceeds through the surveying inspection equipment at the site, records the coordinates of the reference point and various topographical features, and the operator conducts on-site inspection again for the missing part and the error-occurring part, and returns the inspection result. It shows the reflected digital topographic map. However, there is a case in which the reliability of the digital topographic map is lowered as a result of the survey information such as reference points and geographical features being not accurately displayed on the digital topographic map due to on-site inspection. Therefore, the present invention checks and corrects the performance of the digital topographic map through the digital topographic map storage step, coordinate scattering step, spot check step, layer control step, symbol conversion step, vertical line correction step, symbol rotation step, center setting step, and duplicate object correction step. It is possible to secure a digital topographic map that accurately reflects the contents of the field inspection.

In detail, it stores a digital topographic map that includes the coordinates of survey targets such as various facilities and topographical features reflected through geodetic surveys and field inspections. Thereafter, a coordinate scattering step of inputting the raw coordinates marked on the stored digital topographic map onto the CAD is performed. At this time, the dot of the coordinates input on the CAD is primarily found and marked on the digital map corresponding to the coordinates input by the operator. Therefore, as the coordinates are marked by the operator, the coordinates and the point of the dot may not exactly match, and the layer formed by connecting the coordinates that are not accurately entered differs from the layer that appears on the actual digital terrain. The step of checking the hitting point is performed to correspond to the coordinates entered in .

When the spot check is completed as above, a layer is formed according to the checked spot as shown in FIG. 3, and a layer control step is performed to check whether the connection distance of the spot formed according to the spot corresponds to the designated distance. Since the connection distance of the layer is different according to the guidelines of the institution requesting the numerical measurement, the operator is notified when the connection distance of the dots exceeds the specified distance after setting the connection distance of the dots in advance to correspond to each guideline. Accordingly, if the connection distance of the dots needs to be corrected, after adding the coordinates entered above to the connection distances of the dots, the layer control step of resetting the dots, connecting the dots, and checking the connection distance again proceeds.

After the layer control is completed, a symbol conversion step is performed in which the coordinates marked on the layer and the symbols representing the feature corresponding to the coordinates are converted by replacing the coordinates. For example, when the feature located at the corresponding coordinates is a pipe (SA01, ㎈), the coordinates are transformed into corresponding symbols as shown in FIG. 4 .

On the other hand, when the formed layer includes horizontal lines and branch lines, as shown in FIG. 5, a vertical line correction step is performed to ensure consistency and numerical accuracy of the layer by correcting the branch lines to vertical lines so as to be perpendicular to the horizontal lines. After the layer is corrected to a horizontal line and a corresponding vertical line, a symbol rotation step is performed to rotate the symbol so that the deformed symbol is consistently positioned along the line of the layer on the coordinates of the layer. For example, referring to FIG. 6 , when a corresponding symbol is deformed and input to coordinates on a layer, it can be seen that the coordinates are simply input in an overlapping state to the layer. Reliability of the symbol position can be secured by rotating the symbol so that the center of the symbol is positioned according to the line of the layer. Furthermore, in the case of a layer having a predetermined angle as shown in FIG. 5, reliability of the symbol position can be secured by rotating the symbol so as to be perpendicular to the layer.

After the symbol conversion is completed, if there are a plurality of converted symbols and the plurality of symbols indicate a single number of symbols, a center setting step of setting the centers of the symbols may be performed. For example, referring to FIG. 7, when a single manhole is located on the topography and a plurality of manhole covers are arranged around the manhole, the manhole cover is also recognized as a type of manhole, and the coordinates are replaced with symbols corresponding to the manhole. . At this time, by distinguishing the manhole cover and the manhole, connecting the manhole cover to a virtual layer, and designating the center of the layer, it can be corrected with a single manhole. In the case of not correcting with a single manhole, a plurality of dots are displayed due to the coordinates displayed in plurality, and a deformation of the layer connecting the dots may occur, resulting in a digital map different from the actual feature. Therefore, it is preferable to proceed with the center setting step according to the type of the converted symbol after symbol conversion is completed.

As described above, when the dots, layers, and symbols are all corrected according to the setting of the corresponding step, the duplicate object correction step of searching for and correcting duplicate objects is performed. When a plurality of symbols arranged on the coordinates are marked overlapping, it is informed whether the feature is actually a plurality or an error caused by the correction of the spot, and corrects it by deleting or marking a plurality of objects corresponding to the fact. If the overlapping object correction step is not performed, the actual feature may be recognized as multiple rather than multiple, or multiple individuals may be recognized as singular, which may cause inconvenience due to work variables in the event of future repair work or other topographical changes. As such, it is desirable to accurately correct whether or not there are overlapping objects.

Meanwhile, the center line of the road is shown according to the input layer. A road is a concept that includes a sidewalk and a driveway, and examples are given when there are sidewalks on both sides, when there is only one sidewalk, when there are only curbs on the sidewalk, when there are only lanes, when there is a slope, and when there is a barrier on the slope. include According to (c) to (f) above, the average road width, maximum and minimum road width, and center point are displayed after displaying the road using the reference point, coordinates, dot point, and layer. Since the shape of the center line can be changed according to the shape of the road, it is preferable to correct the center line of the road after completing the correction of the layer that satisfies each of the above examples.

The method may include extracting a leader line capable of initiating layer information from a layer for which the layer control is completed, and adjusting the length to correspond to the length of a character input on the leader line.

On the other hand, if the connection distance of the layer exceeds the designated distance in the (d) layer control step, it is necessary to add a dot and conduct inspection (c) to (i) again. When a dot is changed, the layer is changed and the angle, position, and arrangement of the layer shown on the digital map are different, and when the symbol, lead line, center line, etc. marked on the layer are changed, the actual topography and the created digital topographic map are different and the numerical The reliability of the map may be reduced. In addition, for the reliability of the digital map, it is preferable to inspect (d) to (i) again after setting the center in the (f) center setting step for the reasons described above.

As described above, the method for securing the accuracy of a digital topographic map according to another embodiment of the present invention corrects errors occurring in the process of displaying geodetic information on a digital map by primary geodetic survey and on-site inspection to verify it step by step. Therefore, the settings according to the guidelines can be precisely supplemented without being omitted, and the reliability of the digital map can be secured because the geodetic information can be accurately displayed on the digital map.

On the other hand, the protection scope of the present invention is not limited to the description and expression of the embodiments explicitly described above. In addition, it is added once again that the scope of protection of the present invention cannot be limited due to obvious changes or substitutions in the technical field to which the present invention belongs.

Claims (1)

(a) a digital topographic map storage step of uploading a digital topographic map created by geodetic survey and field inspection;
(b) a coordinate scattering step of inputting the original coordinates marked on the stored digital topographic map on a CAD;
(c) a spot check step of checking the spot of the coordinates input on the CAD;
(d) a layer control step of forming a layer according to the checked dots and checking whether a connection distance of the layer formed according to the checked dots corresponds to the specified distance;
(e) a symbol conversion step of converting symbols for each coordinate after layer control is completed;
(f) a vertical line correction step of correcting the vertical lines between the formed layers;
(g) symbol rotation step displayed on the layer after vertical line correction;
(h) a center setting step of setting a center after the symbol conversion;
(i) a duplicate object correction step of searching for and correcting duplicate objects among the dots, layers, and symbols;
(j) a road center line drawing step of drawing a road center line according to the input layer;
(k) extracting a leader line from the layer on which the layer control is completed, and adjusting the length to correspond to the length of a character input on the leader line; Including, but if the connection distance of the layer exceeds the specified distance in the (d) layer control step, a dot is added to inspect (c) to (i) again, and the center setting in the (f) center setting step A method for verifying and correcting the performance of digital topographic maps by geodetic survey, which is to re-verify (d) to (i) after.