KR102182654B1 - Method of inspecting digital topography using augmented reality - Google Patents

Abstract

According to an embodiment of the present invention, a method for inspecting a digital topographical map using augmented reality, comprises the steps of: converting coordinate of digital topographical map data, on which field check data editing and structured editing are completed, into a GNSS (GPS) world geodetic coordinate system; storing the digital topographical map data in a data server to perform searches using a production scale and a map number as a discrimination factor in a smart device; searching for data with respect to the discrimination factor of a digital topographical map to be inspected by an inspector in the smart device, and downloading corresponding data by an inspector′s request; applying, by an inspection AR system, the digital topographic data to a corresponding virtual space; classifying the digital topographic map input after matching the digital topographic map with the inspector′s location, into each object in accordance with a data form and a layer name; and performing an inspection through a comparison of the corresponding object with an actual natural feature when a digital topographic map object is displayed in the smart device and completing the inspection when there is no abnormality. According to the present invention, digital topographic map data can be corrected and inspected by using an augmented reality based system.

Description

Method of inspecting digital topography using augmented reality}

The present invention relates to a digital terrain map inspection method, and more particularly, to a digital terrain map inspection method using augmented reality.

The digital topographic map is largely constructed in the steps of a reference point survey, aerial photographing and drawing, field survey and supplementary survey, correct location editing, and drawing production, and the above process is carried out in accordance with the rules for digital map production.

At this time, the subject who discloses and manages the digital topographic map inspects for omissions and errors in the production of the digital topographic map in order to disclose the digital topographic map. The current digital topographic map production and inspection method is based on the fact that the inspector directly goes to the site and conducts a manual investigation based on the printed paper drawing and the investigation ledger, and if the subject area for inspection is wide or open, use a web map road view, etc. Proceed with inspection.

This field inspection method has several problems. In the case of direct investigation, the inspector matches his current location and the location on the road, and then compares and reads the nearby indicator information and the information on the road. At this time, the facility information on the map is briefly displayed with a set symbol, and there is a difficulty in collating the attributes of each symbol, so there is a problem that there are omissions or errors in the survey as in the field survey in the manufacturing process of a digital topographic map. Investigation using the roadmap also compares and reads the information of the location desired by the user and the information on the map, and there is a problem that errors and unreadable situations occur due to insufficient update of the road view or not being built.

Therefore, in order to solve the above-described problem, the Augmented Reality (AR) technology, which has recently attracted attention in related fields, is to increase the accuracy of the inspection of the digital topographic map and increase the convenience of inspection by allowing the inspector to perform more intuitive inspection. There is a need for a study on how to use the digital topographical map inspection system based on.

Korean Patent Publication No. 10-2013-0004746 (published on January 14, 2013)

It is an object of the present invention to provide a digital topographic map inspection method using augmented reality that is implemented so that digital topographic map data can be supplemented using an augmented reality-based system, and classified according to objects to enable inspection. To provide.

The digital topographical map inspection method using augmented reality according to an embodiment of the present invention is, after on-site inspection and supplemental survey, the correct location and structured editing are completed in order to have the same location information as the inspector using the AR system for inspection. Converting the coordinates of the digital topographic map data into a GNSS (GPS) world geodetic coordinate system; The digital topographic map data, which has been converted to be recognized and compatible with the smart device, is stored in a data server so that it can be searched using the production scale and the drawing number as a separator; The smart device performing a data search based on a classification factor of a numerical topographic map to be inspected by an inspector, and downloading the corresponding data at the request of an inspector; When the digital topographic map data is downloaded while the inspection AR system is running and the inspection AR system recognizes the corresponding digital topographic map, a virtual location space is created based on the production scale of the digital topographic map, and the digital topographic map data is converted into the corresponding virtual map. Applying to the space; Classifying the inputted digital topographic map into individual objects according to the type of data and the layer name after the digital topography map and the position of the inspector are matched; And if the digital topographic map object is expressed in the smart device, the inspection is performed by comparing the object and the actual feature, and if there is no abnormality, the inspection is completed.

In the above, the digital topographic map data converted to the GNSS (GPS) world geodetic coordinate system includes converting the data into a compatible format for data recognition on a smart device.

In the above, the virtual space is calculated as a contrast range for location recognition by generating several square grids inside based on the outside of the digital topographic map, and the corresponding grid contains location information close to the current GPS signal-based location information of the user. It further includes the step of searching and displaying a digital topographic map on the system.

In the above, the method further includes the step of checking/contrasting the location of the inspector through the GPS signal received by the smart device to search for a grid closest to the current location information, and displaying a digital topographic map based on the center of the grid.

In the above, in the data classification of the digital topographic map data, linear data and point-shaped data are classified by using the unique code indicated in the layer specification, and a list of digital topographic map layers (attributes) is displayed by layer classification for the linear object. , Further comprising the step of expressing the digital topographic map object (figure) by layer classification for the point-like object.

The classified object is displayed on the screen of the smart device, and the display height is adjusted based on the height on the screen of the inspector so that the displayed data has a height value for the terrain elevation.

In the above, if the actual feature and the digital topographical map object are different during the inspection process, the inspector generates a photo file into which the current location information is input through a camera photographing function to obtain information on a correction request point requiring correction; The generated photo file is transmitted to and stored in a data server, and further comprises a step of being classified and stored based on the map number of the digital topographic map expressed at the time of shooting, and the data stored in the data server is numerically reflected so that the modified content is reflected. It is characterized in that the topographic map is continuously updated and used to supplement the digital topographic map.

The method of inspecting the digital topography may be performed by a computer program stored in a computer-readable storage medium.

The digital topographic map inspection method using augmented reality of the present invention applies a digital topographic map to a virtual space so that digital topographic map data can be supplemented using an augmented reality-based system, and classified according to objects to enable inspection, It has the advantage of easy supplementation and inspection of the digital topographic map.

In addition, when a digital topographic map object is displayed on a smart device, the inspector conducts the inspection by comparing the object and the real feature, and if the real feature and the digital topographic map object are different, the inspector enters the current location information through the camera shooting function. There is an advantage in that digital terrain can also be supplemented by creating a photo file that needs to be corrected and obtaining information on the point of request for correction.

In addition, in the virtual space, a number of square grids are created inside based on the outside of the digital topographic map to calculate the contrast range for location recognition, so that the grid quickly searches for location information closest to the user's current GPS signal-based location information. Therefore, it is effective to increase the speed and accuracy of the digital topographic map displayed on the inspection AR system in the future.

1 is a flow chart for briefly explaining the concept of a digital terrain map inspection method using augmented reality according to an embodiment of the present invention.
2 is a diagram for explaining matching of digital topographic map data and inspector position.
3 is a diagram for explaining classification and expression of a digital topographic map data layer.
4 is a diagram showing an example of a supplementary area photographing function and data server transmission.
5A and 5B are flow charts showing a method of inspecting a digital terrain map using augmented reality according to an embodiment of the present invention.
6 is a diagram illustrating the results of a verification method utilizing augmented reality.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. However, the spirit of the present invention is not limited to the presented embodiments, and those skilled in the art who understand the spirit of the present invention can add, change, or delete other elements within the scope of the same idea. Other embodiments included within the scope of the inventive concept may be easily proposed, but it will be said that this is also included within the scope of the inventive concept. In addition, components having the same function within the scope of the same idea shown in the drawings of each embodiment will be described with the same reference numerals.

1 is a flow chart for briefly explaining the concept of a method for inspecting a digital topographic map using augmented reality according to an embodiment of the present invention, and FIG. 2 is a diagram for explaining matching of the digital topographic map data and the inspector position. 5B is a flow chart showing the overall digital topographical map inspection method using augmented reality according to an embodiment of the present invention.

The digital topographic map inspection method using augmented reality of the present invention is, first, after completing the field inspection and supplementary survey, the digital topographic map data on which the correct position and structured editing are completed is the same position as the inspector using the inspection AR system (review AR application). In order to have information, it is converted into a GNSS (GPS) world geodetic coordinate system (S10, S12). Here, the AR system for inspection can be an application that can be executed on a smart device to inspect digital topographic map data based on augmented reality, and can be manufactured so that a digital topographic map object can be expressed and used for inspection.

The digital topographic map data converted to the GNSS (GPS) world geodetic coordinate system converts the existing CAD format (.dxf or .dwg) file into a GIS format (.shp or geojson) file for data recognition on a smart device (S16). Here, the smart device may be, for example, a smartphone, a phablet phone, a tablet, a notebook computer, or an ultrabook.

The digital topographic map data, which has been converted to be recognized and compatible with the smart device, is stored in the data server so that it can be searched using the production scale and the drawing number as a separator (S16).

The smart device searches for data based on the classification factor of the numerical topographic map to be inspected by the inspector, and downloads the data at the request of the inspector (S22, S26).

When the digital topographic map data is downloaded while the inspection AR system is running and the inspection AR system recognizes the corresponding digital topographic map, a virtual location space is created based on the production scale of the digital topographic map, and the digital topographic map data is stored in the corresponding virtual space. Apply to (S18, S24, S28).

In this case, a number of square grids are created inside the virtual space based on the outer periphery of the digital topographic map, and the contrast range for location recognition is calculated (for example, the minimum spatial resolution of the grid may be 5 m).

The grid serves to increase the speed and accuracy of the digital topographic map displayed on the AR system for inspection in the future by quickly searching for the location information closest to the current GPS signal-based location information of the user (S24).

Each grid has a unique number, and the corresponding unique number is used to replace the coordinates of the number of digits at the center of the grid location. Here, the coordinates are two factors, x and y, so to simplify the search, replace them with a single variable, a unique number.

When the above-described process is completed, the smart device checks/contrasts the location of the inspector through the received GPS signal, searches for the grid closest to the current location, and displays a digital topographic map based on the center of the grid.

After the digital topography map and the position of the inspector are matched, the input digital topographic map is classified into each object according to the type of data and the layer name, as shown in Fig. 3, and the criteria for classification are based on the layer specification according to the digital topographic map work regulations. Follow (S30).

At this time, the reason for classifying the digital topographic map data according to the object is to allow the inspector to distinguish between the actual facility and the object on the digital map to facilitate the inspection.

The data classification of digital topographic map data uses the unique code indicated in the layer specification, and three classifications proceed after classifying linear data and point data first.

That is, the numerical topographic map layer list (attribute) is expressed by layer classification for linear objects (S32 to S36), and the digital topographic map object (figure) is expressed by layer classification for point-shaped objects (S38 to S42). For example, roads, borders, and roads are displayed in the digital topographic map layer list, and manholes are represented as digital topographic map objects.

Classified objects are displayed on the screen of the smart device as shown in FIG. 4. Since the displayed data (numerical topographic map object) does not have a height value for topographic elevation, the data has a height value for topographic elevation. So, adjust the display height based on the screen height of the inspector.

When the digital terrain map object is expressed on the inspector's smart device, the inspector proceeds the inspection through comparison of the object and the real feature, and if there is no abnormality, the inspection is completed (S44, S48).

During the inspection process, when the actual feature and the digital topographical map object are different, the inspector generates a photo file with the current location information inputted through the camera photographing function to obtain the correction request point information that needs to be corrected (S46).

The photo file generated including the correction request point information is transmitted to and stored in a data server, and is classified and stored based on the map number of the digital topographic map expressed at the time of shooting (S46).

The stored data are continuously updated so that the revisions are reflected, and there is an advantage that can be used for final supplementation. 6 shows the results of the inspection method utilizing augmented reality as an example.

In addition, the digital terrain map inspection method using augmented reality according to an embodiment of the present invention may be implemented in the form of program commands that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like alone or in combination.

The program instructions recorded on the medium may be specially designed and configured for the present invention, or may be known and usable to those skilled in computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical media such as CD-ROMs and DVDs, and magnetic media such as floptical disks. -Includes magneto-optical media, and hardware devices specially configured to store and execute program instructions such as ROM, RAM, flash memory, solid state drive (SSD), and the like.

Examples of the program instructions include not only machine language codes such as those produced by a compiler, but also high-level language codes that can be executed by a computer using an interpreter or the like.

In addition, the configuration such as a computer or a computer program used in the present invention has the same meaning as a smartphone or an application running on a smartphone, as the shape of the mobile communication terminal is transformed like a smartphone, and as the computing power increases dramatically. Can be used.

Claims (8)

After the on-site inspection and supplementary survey, converting the coordinates of the digital topographic map data completed with the correct location and structured editing to the GNSS (GPS) world geodetic coordinate system in order to have the same location information as the inspector using the inspection AR system;
The digital topographic map data, which has been converted to be recognized and compatible with the smart device, is stored in a data server so that it can be searched using a production scale and a drawing number as a separator;
The smart device performing a data search based on a classification factor of a numerical terrain map to be inspected by an inspector, and downloading the corresponding data at the request of the inspector;
When the digital topographic map data is downloaded while the above-described AR system for inspection is running, and the AR system for inspection recognizes the corresponding digital topographic map, a virtual location space is created based on the production scale of the digital topographic map, and the digital topographic map data is correlated. Applying to a virtual space;
Classifying the inputted digital topographic map into individual objects according to the type and layer name of the data after the digital topography map and the position of the inspector are matched;
A digital terrain map inspection method using augmented reality, comprising the step of performing an inspection through comparison of the object and the actual feature when the digital terrain map object is expressed in the smart device, and completing the inspection if there is no abnormality. The method of claim 1,
A digital topographic map inspection method using augmented reality, further comprising converting the digital topographic map data converted to the GNSS (GPS) world geodetic coordinate system into a compatible format for data recognition on a smart device. The method of claim 1,
The virtual space is calculated as a contrast range for location recognition by generating several square grids inside based on the outside of the digital topographic map, and the corresponding grid searches for location information close to the user's current GPS signal-based location information A digital topography inspection method using augmented reality further comprising the step of being expressed on the system. The method of claim 3,
Using augmented reality further comprising the step of checking/contrasting the location of the inspector through the GPS signal received by the smart device to search for a grid closest to the current location information, and displaying a digital topographic map based on the center of the grid. How to inspect digital topography. The method of claim 1,
The data classification of the digital topographic map data uses the unique code indicated in the layer specification to classify linear data and point-type data, and a list of digital topographic map layers (attributes) is displayed by layer classification for linear objects. A digital topographic map inspection method using augmented reality, further comprising a step in which a digital topographic map object (figure) is expressed by layer classification. The method of claim 5,
The classified object is displayed on the screen of the smart device, and the displayed data is a numerical value using augmented reality, characterized in that the display height is adjusted based on the height on the screen of the inspector so as to have a height value for the terrain elevation. Topographic inspection method. The method of claim 1,
If the actual feature and the digital topographical map object are different during the inspection process, the inspector generates a photo file into which the current location information is input through a camera photographing function, and obtains correction request point information requiring correction;
The generated photo file is transmitted to and stored in a data server, further comprising the step of being classified and stored based on the map number of the digital topographic map expressed at the time of shooting,
The digital topographic map inspection method using augmented reality, characterized in that the data stored in the data server is continuously updated so that the modified content is reflected, and is used to supplement the digital topographic map. A computer program stored in a computer-readable storage medium that performs the digital terrain map inspection method of any one of claims 1 to 7.

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