KR100964317B1 - System and method for transforming grd file to geomania gcd file - Google Patents

Abstract

The present invention extracts the data of the header part and the grid information part of the GRD file, which is the surfer grid data format, converts the header part and the grid part of the GCD file, which is the geomania grid data format, and converts the header part and the grid part of the GRD file. The present invention relates to a system and method for converting a GDL file into a geomania indicator file, by extracting cell values of rows and columns and converting the cell values in a grid part of a GCD file to reduce spatial data construction costs and time.

GIS, GRD, GCD, GRID, RASTER, Convert, Cell, File Format

Description

SYSTEM AND METHOD FOR TRANSFORMING GRD FILE TO GEOMANIA GCD FILE}

The present invention extracts the data of the header part and the grid information part of the GRD file, which is the surfer grid data format, converts the header part and the grid part of the GCD file, which is the geomania grid data format, and converts the header part and the grid part of the GRD file. Extracts cell values of rows and columns and converts each cell value within a grid part of a GCD file to convert a GRD file to a GCD file, thereby converting a GDL file into a geomania indicator file, which can reduce the cost and time of building spatial data. System and method.

In general, the Geographic Information System (GIS) is a system of hardware, software, maps, personnel, organizational and institutional devices for collecting, storing, analyzing, and providing a variety of information related to terrain, geology, geography, land, and so on. It is.

The primary purpose of such a geographic information system is to provide a desired information service to a user, and the secondary purpose is to store and manage the geographical phenomena of the real world. That is, it is more important to provide a service of geographical information desired by a user than to informatize geographical phenomenon.

To this end, geographical phenomena are accurately and effectively informed by geographic information systems in different forms according to information and functions desired by the user, and one of the most important parts is data.

The reason for this is that not only is the construction of the data most costly to build a geographic information system, but also the right construction of the data is essential to determine the quality of the functions provided by the geographic information system.

As described above, in the geographic information system used at home and abroad, a surfer grid file, that is, a GRD file, which is a grid data format of Golden Software, is widely used, and a geographic information system is used in a geographic information system used in Korea. GCD files, a grid data format from GEOMania, a software for GIS, are widely used.

Accordingly, in order to use GRD files in geographic information systems that use GCD files, they must be converted to GCD files.

However, in the geographic information system pre-built with GRD files, the GRD files are not converted to GCD files, which makes it impossible to use the grid-type geospatial data pre-built with GRD files, and it is costly and time-consuming to construct spatial data. There is a problem.

Accordingly, the present invention extracts the header part and grid information part of the GRD file, which is a surfer grid data format, and the header part of the header part and grid part, of a GCD file, which is a Geomania grid data format. Can reduce the cost and time of building spatial data by extracting the cell values of all the rows and columns in the grid part of the GRD file and converting each cell value within the grid part of the GCD file to convert the GRD file to a GCD file. It is an object of the present invention to provide a system and method for converting an Aldi file into a Geomania directed di file.

According to an embodiment of the present invention, a system for converting a GDL file into a geomania indicator file includes a first file name to be converted, a second file name to be created, and a control command for converting the first file to the second file. Input unit for receiving a; A program storage unit for storing a conversion program for converting the first file into the second file; A memory for storing the second file; And receiving the first file name, the second file name, and the control command from the input unit, analyzing the control command, and activating a file conversion program stored in the program storage unit to determine the header part of the first file according to the control command. After extraction, it is determined whether the file can be converted using the X-direction and Y-direction grid size information of the first file, and the first file is converted into a second file by using the extracted header part information. And a calculation processing unit for storing.

In the system for converting a GDL file into a geomania indicator file according to an embodiment of the present invention, the arithmetic processing unit may determine whether the absolute value of the (X grid size-Y grid size) / Y grid size exceeds 0.001. If the value exceeds 0.001, file conversion is terminated.

In the system for converting a GDL file into a geomania indicator file according to an embodiment of the present invention, the calculation processing unit may not have an absolute value of the (X grid size-Y grid size) / Y grid size of 0.001. If not, the second lower left region is calculated from the lower left coordinates of the first file by reducing 50% of the cell size from the X and Y coordinate values of the lower left node of the first file, respectively, 50% of the cell size is added to the X and Y coordinate values of the upper right node of the file, and the upper right area of the second file is calculated from the upper right node coordinates of the first file and stored in the memory.

According to an embodiment of the present invention, the calculation processing unit generates the second file using the header part information of the first file stored in the memory in a system for converting a GDL file into a geomania indicator file. The information of each cell of the first file stored in the two-dimensional array form in the grid information part existing after the header part information of one file is read from the memory and written in each cell of the second file configured in the two-dimensional array form.

In the system for converting a GDL file into a GOMmania file according to an embodiment of the present invention, the arithmetic processing unit may include an invalid cell distinguishing value for identifying an invalid cell of the first file, and an invalid cell distinguishing column of the second file format header. The first file stored in the two-dimensional array form in the lattice part existing after the header information of the first file, and reading the information of each cell into the memory. Write to cell.

In the system for converting a GDL file into a GOMmania file according to an embodiment of the present invention, the operation processor may additionally convert unit cells based on the number of rows and columns of header part information of the first file stored in the memory. Determine whether information remains in the first file.

In the system for converting a GDL file into a Geomania indicator file according to an embodiment of the present invention, the header part information includes the number of rows, columns, lower left node coordinates, upper right node coordinates, and X of the grid of the first file. Directional grid size, Y-direction grid size information is included.

According to an embodiment of the present invention, a method of converting a GDL file into a geomania indicator file may include a) a first file name to be converted, a second file name to be created, and a file for converting the first file to the second file. Receiving a control command; b) extracting a header part of the first file according to the control command; c) determining whether the file can be converted using the X-direction and Y-direction grid size information of the first file; d) converting the X, Y coordinate values of the lower left node of the first file and the X, Y coordinate values of the upper right node of the first file according to the format of the second file when the file conversion is possible; And e) generating the second file using the extracted header part information.

In the method of converting a Gdi file into a Geomania indication file according to an embodiment of the present invention, the step e) may include e-1) reading cell unit information from the first file; e-2) writing each cell information into a unit cell of the second file using the extracted header part information; And e-3) determining whether the processing unit cell information remains in the first file and closing the first file if the cell unit information does not remain.

In the method of converting a GDL file into a GOMmania file according to an embodiment of the present invention, the header part information may include the number of rows, columns, lower left node coordinates, upper right node coordinates, and X of the grid of the first file. Directional grid size, Y-direction grid size information is included.

The present invention extracts the data of the header part and the grid information part of the GRD file, which is the surfer grid data format, converts the header part and the grid part of the GCD file, which is the geomania grid data format, and converts the header part and the grid part of the GRD file. Spatial data construction cost and time can be reduced by extracting the cell values of rows and columns and converting them into cell values within the grid part of the GCD file to convert the GRD file into a GCD file.

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

FIG. 1 is a diagram illustrating a system for converting a GDL file into a Geomania indication file according to an embodiment of the present invention.

Referring to FIG. 1, a system for converting a GDL file into a Geomania indicator file according to an embodiment of the present invention receives a file name of a first file to be converted and a file name of a second file to be created and is controlled by a user. All of the operations for converting the GRD file stored in the map data storage unit 4 according to the input unit 2 receiving the command, the map data storage unit 4 storing the map data, and the control command transmitted from the input unit 2 An arithmetic processing unit 6 for arithmetic processing, a memory 8 for temporarily storing a result value calculated by the arithmetic processing unit 6, and a program storage unit 10 for storing a conversion program for converting a GRD file into a GCD file And a video memory 12 and a screen display unit 14 for displaying the map file to be converted on the screen.

The input unit 2 controls and converts from the user a control command for converting a GRD file, a surfer GRID file used in a Golden Software System, into a GCD file, a grid data file of Geomania. The first file GRD file name and the second file GCD file name to be created are input.

The map data storage unit 4 stores a GRD file, which is a Surfer GRID file used in the Golden Software System.

When the GRD file which is the first file to be converted and the GCD file name which is the second file to be generated are selected by the input unit 2, the operation processor 6 analyzes the control command transmitted from the input unit 2 and stores the program. 10 is read to activate a file conversion application based on a geographic information system having a file conversion function.

Further, the arithmetic processing unit 6 reads the GRD file stored in the map data storage unit 4 and temporarily stores the read GRD file in the memory 8.

The operation processor 6 analyzes the header portion of the GRD file temporarily stored in the memory 8 to secure the X and Y direction cells of the grid stored in the GRD file, the coordinates of the lower left node, and the coordinates of the upper right node. After that, it is stored in the memory (8).

In this case, since only the square grid data is stored in the GRD file, the calculation processing unit 6 stops converting the file when the difference between the X-direction grid size and the Y-direction grid size exceeds 0.1% based on the Y-direction grid size of the GRD file. Let's do it.

The operation processing unit 6 calculates the GCD lower left region from the lower left coordinate of the GRD file by converting 50% of the cell size from the X and Y coordinate values of the lower left node of the GRD file, respectively, and converts it to the upper right node of the GRD file. 50% of the cell size is added to the X and Y coordinates of the GD file to calculate the upper right area of the GCD file and store it in the memory (8).

In addition, the arithmetic processing unit 6 generates a GCD file using the header part information of the GRD file stored in the memory 8, and stores the GRD stored in a two-dimensional array in a grid information part existing after the header part information of the GRD file. Information of each cell of the file is read from the memory 8 and written in each cell of the GCD file formed in a two-dimensional array.

Then, the arithmetic processing unit 6 closes the GRD file in which the conversion target information has been read, and stores the GCD file in the map data storage unit 4 in the geomania grid file in which the writing of the grid information is completed.

In addition, the arithmetic processing unit 6 stores the GCD file stored in the map data storage unit 4 in the video memory 12 so that the screen display unit 14 can display it.

Accordingly, the screen display unit 14 displays the GCD file stored in the video memory 12 on the screen.

The memory 8 temporarily stores the result value calculated by the calculation processing unit 6.

This memory 8 is composed of random access memory (RAM).

The program storage unit 10 stores a conversion program for converting the GRD file into a GCD file.

The video memory 12 stores map file information to be converted, and the screen display unit 14 displays map file information stored in the video memory 12.

Here, the video memory 12 and the memory 8 may be composed of one memory.

In addition, the map data storage unit 4 and the program storage unit 10 may be a hard disk drive (HDD) or an optical disk drive (ODD).

As described above, a system for converting a GD file into a GOM file in accordance with an embodiment of the present invention uses a GRD file, which is a grid data exchange data format used in a GIS and a golden software system. By converting them into GCD files, which are enthusiast grid data files, the cost and time required to build spatial data can be reduced.

FIG. 2 is a diagram showing a GRD file format, and FIG. 3 is a diagram showing a GCD file format.

2 and 3, the GRD file is largely composed of a header part and a grid (row and column) part.

Here, the header part includes the coordinates of the lower left node, the coordinates of the upper right node, the grid size in the left and right (X) directions, the grid size in the up and down (Y) directions, the number of grid rows, the number of grid columns, and invalid cell values. It is composed of invalid cell distinguishing value to distinguish.

Here, the lower left node coordinates and the upper right node coordinates mean a "node" method, that is, the coordinates of the center point of the grid cell.

In addition, the grid (column, row) part stores the values for each grid cell.

The GCD file is a data format that is widely used in various national geographic information system construction projects and national research projects conducted by governments and local governments and in the construction of GIS grid systems by private companies. It consists of header parts and grid parts.

The header part specifies the range of grid data in left, right, up and down coordinates. The header part stores information about the entire grid file such as the grid size and data type, and the grid part contains the grid cell values of each row / column. Is stored.

4 is a flowchart illustrating a method of converting a GDL file into a geomania indicator file according to an embodiment of the present invention.

Referring to FIG. 4, a method of converting a GDL file into a geomania indicator file according to an embodiment of the present invention, first, a control command for converting a GRD file into a GCD file from a user, a GRD file name to be converted and When the GCD file name is input to the input unit 2, the operation processing unit 6 performs initial preparation for converting the GRD file into a GCD file according to the control command input to the input unit 2 (S100).

In this case, step S100 refers to a process of confirming whether a newly generated GCD file name, an automatic generation of a serial number to be used as a suffix in the file name when an existing GCD file exists, and whether the user accepts the configured file name.

Subsequently, the calculation processing unit 6 reads the header part of the GRD file selected in step S100 according to the control command transmitted from the input unit 2, and the number of rows of the grid, the number of columns, After extracting and grasping the lower left node coordinates, the upper right node coordinates, the X-direction grid size, and the Y-direction grid size information, the GRD file is temporarily stored in the memory 8 (S110).

Here, the GRD file selected in step S100 means that the calculation processing unit 6 selects and reads the GRD file name stored in the map data storage unit 4 from the GRD file name transmitted from the input unit 2.

Thereafter, the arithmetic processing unit 6 reads the GRD file stored in the memory 8 and checks whether the difference between the X-direction grid size and the Y-direction grid size exceeds 0.1% based on the Y-direction grid size information (S120).

That is, the arithmetic processing unit 6 checks whether or not the absolute value of (X-direction grid size-Y-direction grid size) / Y-direction grid size exceeds 0.001, and terminates file conversion when the value exceeds 0.001. do.

On the other hand, if the value does not exceed 0.001, the calculation processing unit 6 calculates the lower left node of the GCD file area from the coordinates of the lower left node of the GRD file stored in the memory 8 in the lower left node of the GRD file. 50% of the cell size is subtracted from the X and Y coordinate values, respectively, and the coordinates of the lower left node of the GRD file are converted to the lower left coordinates of the GCD file area, and then the lower left coordinates of the converted GCD file area are converted into the memory 8. Save it.

In addition, the calculation processing unit 6 adds 50% of the cell size from the X and Y coordinates of the GRD file upper right node to calculate the GRD file upper right node from the coordinates of the GRD file upper right node stored in the memory 8, respectively. The coordinates of the upper right node of the file are converted into the upper right coordinates of the GCD file area and the converted upper right coordinates of the converted GCD file area are stored in the memory 8 (S130).

Subsequently, the arithmetic processing unit 6 generates a GCD file using coordinate information of the lower left and upper right of the GCD file area stored in the memory 8 and stores the generated GCD file in the map data storage unit 4 ( S140).

At this time, the arithmetic processing unit 6 stores the invalid cell division value (Blankvalue) for distinguishing the invalid cell of the GRD file in the invalid cell division column which is the last 56 bytes empty space of the GCD file format header (S150).

Information of each cell is not written in the GCD file generated until step S150.

Accordingly, the calculation processing unit 6 reads the unit cell information of the grid part existing after the header information of the GRD file stored in the map data storage unit 4 and stores it in the memory 8 (S160).

At this time, the arithmetic processing unit 6 reads the information of each cell of the GRD file stored in the two-dimensional array form in the lattice part existing after the header information of the GRD file into the memory 8 of the GCD file composed of the two-dimensional array form. Write in each cell (S170).

Subsequently, the arithmetic processing unit 6 determines whether the unit cell information to be further converted remains on the GRD file based on the number of rows and columns among the header part information of the GRD file stored in the memory 8, and then converts the unit cell information to be converted. If is present, repeat steps S160 and S170, and closes the GRD file if there is no unit cell information to be changed (S180, 190).

In addition, the arithmetic processing unit 6 stores, in the map data storage unit 4, the GCD file in which the lattice part information has been written (S200).

As described above, a method of converting a GD file into a GOM file in accordance with an exemplary embodiment of the present invention uses a GRD file, which is a grid data exchange data format used in a GIS and a golden software system. By converting them into GCD files, which are enthusiast grid data files, the cost and time required to build spatial data can be reduced.

FIG. 1 is a diagram illustrating a system for converting a GDL file into a Geomania indication file according to an embodiment of the present invention.

2 is a diagram illustrating a GRD file format.

3 is a diagram illustrating a GCD file format.

4 is a flowchart illustrating a method of converting a GDL file into a geomania indicator file according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

2: input unit 4: map data storage unit

6: arithmetic processing unit 8: memory

10: program storage unit 12: video memory

14: screen display

Claims (10)

An input unit for receiving a first file name to be converted, a second file name to be created, and a control command for converting the first file into the second file; A program storage unit for storing a conversion program for converting the first file into the second file; A memory for storing the second file; And After receiving a first file name, a second file name and a control command from the input unit, after analyzing the control command, activates a file conversion program stored in the program storage unit, and extracts the header part of the first file according to the control command. Determining whether the file can be converted using the X-direction and Y-direction grid size information of the first file, and converting the first file into a second file using the extracted header part information and storing the converted file in the memory. A calculation processing unit; The calculation processing unit (X grid size-Y grid size) / Y-direction grid size checks whether the absolute value exceeds 0.001, if the value exceeds 0.001, the file conversion is terminated, (X-direction grid size-Y-direction grid size) / If the absolute value of the Y-direction grid size does not exceed 0.001, 50% of the cell size is reduced by converting 50% of the cell size from the X, Y coordinate values of the lower left node of the first file. By calculating the lower left region of the second file from the lower left coordinates of the first file, by adding 50% of the cell size from the X, Y coordinate values of the upper right node of the first file, respectively, the upper right node of the first file And a GD file to a GOM file, characterized in that the upper right area of the second file is calculated from coordinates and stored in the memory. delete delete The method of claim 1, The operation processor generates the second file using the header part information of the first file stored in the memory, and stores the second file in a two-dimensional array form in a grid information part that exists after the header part information of the first file. A system for converting a Gdi file into a Geomania directed file, characterized in that the information of each cell of the first file is read from the memory and written in each cell of the second file in a two-dimensional array. The method of claim 4, wherein The calculation processing unit An invalid cell distinguishing value for distinguishing invalid cells of the first file is stored in an invalid cell distinguishing column of the second file format header and stored in a two-dimensional array in a grid part existing after the header information of the first file; 1. A system for converting a Gdi file into a Geomania directed file, characterized in that the information of each cell of the file is read into the memory and written in each cell of the second file in a two-dimensional array. The method of claim 5, The calculation processing unit A method of determining whether a unit cell information to be additionally converted based on the number of rows and columns in the header part information of the first file stored in the memory remains in the first file. System to convert cd files. The method of claim 1, The header part information includes the number of rows of the grid of the first file, the number of columns, the lower left node coordinates, the upper right node coordinates, the X-direction grid size, and the Y-direction grid size information. A system for converting enthusiast files to files. a) receiving a first file name to be converted, a second file name to be created, and a control command for converting the first file to the second file; b) extracting a header part of the first file according to the control command; c) determining whether the file can be converted using the X-direction and Y-direction grid size information of the first file; d) converting the X, Y coordinate values of the lower left node of the first file and the X, Y coordinate values of the upper right node of the first file according to the format of the second file when the file conversion is possible; And e) generating the second file using the extracted header part information; Step e) e-1) reading cell unit information from the first file; e-2) writing each cell information into a unit cell of the second file using the extracted header part information; And e-3) determining whether the processing unit cell information remains in the first file, and closing the first file if the cell unit information does not remain. How to convert to file. delete The method of claim 8, The header part information includes the number of rows of the grid of the first file, the number of columns, the lower left node coordinates, the upper right node coordinates, the X-direction grid size, and the Y-direction grid size information. How to convert enthusiast instructions to file.

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