KR100325435B1 - Method of Manufacturing Map Using Satellite Image Data - Google Patents

Abstract

The present invention relates to a method of making a map using satellite image data that can reduce map production time and improve accuracy by making a map using image data of satellites.

In the map production method using the image data of the satellite of the present invention, after mapping the image data and the numerical data, geometric correction of the image data based on the coordinate information of the numerical data so that the image data and the numerical data have the same position information. And orthogonally correcting the error of the undulation displacement so that the periphery of a given image pickup area has orthogonal projection characteristics, and combining orthodontic unit data into continuous data so that orthodontic data can be displayed in a large area. A mosaic step, an image fusion step of mixing the color information of the multispectral image data while maintaining the resolution of the chrominance image data included in the image data, and map information including details of the feature in the image fusion data. Generating a two-dimensional map by adding the After generating a digital elevation model to create a model based on the digital elevation model to create a model, such as the actual indicators, and adding the image fusion data on the model to generate three-dimensional orthographic image data Generating a 3D map by adding map information including details of a feature to 3D orthogonal image data, and inputting longitude and altitude information for a specific region to generate the 3D orthographic image data. Converting to video.

According to the present invention, an existing vector map can be produced as a vector map with the latest information based on the image data generated through the satellite image processing step, and the readability problem of the existing vector map is superimposed by superimposing the vector map on the image. In addition to solving this problem, we can create satellite image maps that maximize visual effects by developing and adding unique graphic elements. In addition, it is possible to simply create a three-dimensional map using only the image data and the digital map of the satellite. In addition, since the information included in the image data of the satellite can be included in the map, a precise map can be produced.

Description

Mapping method using satellite image data {Method of Manufacturing Map Using Satellite Image Data}

The present invention relates to a cartographic method, and more particularly, to a map production method using satellite image data that can reduce map production time and improve accuracy by making a map using image data of satellites.

Recently, as the development of a location tracking device such as a navigation system is accelerated, a high-precision map is required for not only aircraft, vehicles, ships, but also various electronic and service industries.

Currently used maps are classified into paper maps, numerical maps, and three-dimensional maps. Paper maps are produced by reviewing and editing additional information for various purposes based on the national basic maps generated by the National Geographical Institute. Such a paper map is first made of a film, and then completed by printing and publishing the produced film. The completed paper map is sold through various media or used as basic data for digital mapping. A digital map is a map in which the information of a paper map is digitized into a set of geometric figure elements or pixels in the form of points, lines, and planes. The digital map is manufactured by scanning a paper map and converting the scanning data into geometric figure data such as points, lines, and surfaces. In general, digital data of numerical maps are stored and managed in the format of CAD or graphic software. The digital data of the numerical map is stored in various electronic devices such as a navigation system, an aircraft, a vehicle, a ship, and the like, and the stored numerical map is displayed as shown in FIG. 1. Three-dimensional map refers to a map containing spatial (or height) information of buildings and terrain. Such a 3D map is generated by mapping coordinate information and graphic information. That is, virtual three-dimensional geometric data is generated based on two-dimensional information (for example, a photograph and a map). 3D maps are made by adding colors and images to the generated 3D geometric data.

Such paper maps, digital maps, and three-dimensional maps are produced based on the national basic maps issued at 1: 5000, 1: 25000, and 1: 50000 accumulations. However, since the national basic map renewal cycle is more than one year, it is difficult to include the latest information in paper maps, digital maps, and three-dimensional maps. In addition, maps produced through national basic maps and actual survey activities are lost because much information is produced by generalizing or abstracting the surface. In addition, in order to produce 3D maps, a great deal of time must be spent researching the information on the actual surface. The surveyed surface information is transformed into 3D object through modeling work, and arbitrary color and image must be added to the converted object so that it can be seen as a real terrain. Therefore, it takes a lot of manufacturing cost and production time to create a three-dimensional map. In addition, since arbitrary color and image must be added, many process steps are required and accurate information cannot be displayed.

Accordingly, an object of the present invention relates to a method of making a map using satellite image data, which can reduce map making time and improve accuracy by making a map using image data of a satellite.

1 is a diagram showing a conventional numerical map.

2 is a flow chart showing a map making method of the present invention.

FIG. 3 is a view showing the color image data shown in FIG. 2; FIG.

FIG. 4 is a diagram illustrating multispectral image data shown in FIG. 2. FIG.

5A to 5C are diagrams showing the color corrected image data generated by the chromatic color image data and the numerical map shown in FIG. 2;

FIG. 6 is a diagram illustrating image data generated by the image fusion process shown in FIG. 2. FIG.

7 shows a two-dimensional map generated by the present invention.

8 is a diagram illustrating a process of adding height information to a numerical map;

FIG. 9 is a diagram illustrating an index shape generated through the process of FIG. 8. FIG.

10 shows a three-dimensional map generated by the present invention.

<Description of Symbols for Main Parts of Drawings>

24, 26: box

In order to achieve the above object, a map making method using the image data of the satellite of the present invention is based on the coordinate information of the numerical data so that the image data and the numerical data have the same position information after collecting the image data and the numerical data. Geometrically correcting the image data, orthogonally correcting the error of the undulation displacement so that the periphery of a certain imaging area has orthogonal projection characteristics, and orthogonally corrected unit data so that the orthodontic data can appear in a large area. A mosaic step of combining the continuous data, an image fusion step of mixing the color information of the multispectral image data while maintaining the resolution of the gray color image data included in the image data, and details of the features in the image fused data. Create 2D satellite image map by adding vector map information including details Creating a digital elevation model so that the numerical data can contain height information, and then creating a model such as an actual indicator based on the digital elevation model, and adding image fusion data to the model. Generating three-dimensional orthographic image data, adding map information including details of the feature to the three-dimensional orthographic image data, and generating a three-dimensional satellite image map, and a path to a specific region. And converting the 3D orthographic image data into a video by inputting a factor related to simulation of altitude information and the like.

Other objects and features of the present invention in addition to the above objects will become apparent from the description of the embodiments with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described with reference to FIGS. 2 to 10.

2 is a flowchart illustrating a cartographic method of the present invention.

Referring to FIG. 2, satellite image data photographed from a satellite is used for mapping according to the present invention. In detail, first, image data photographing the surface of the satellite and a digital map already prepared are collected. (S2, S4) The data photographed from the satellite is classified into gray color image data and multispectral image data. The full-color image data is an image containing black and white information as shown in FIG. 3 and has a high spatial resolution. The multispectral image data is an image containing color information as shown in FIG. 4 and has a lower spatial resolution than that of the full color image data. The digital map and the satellite image data collected in steps S2 and S4 are superimposed for image correction. (S6) The satellite image data is geometrically corrected so that the digital map and the satellite image data superimposed in step S6 have the same position information. (S7) Geometry correction refers to the operation of making image data have location information such as a digital map by referring to the location information of the digital map. The image data of the satellite is caused by the attitude of the satellite, the curvature of the earth, the direction of the satellite, the difference in the coordinate projection method, the error of the observer and the rotation of the earth. That is, the digital map and the satellite image data superimposed at step S6 are not exactly matched. Therefore, through the geometric correction step as in S7, the distortion of the image data is corrected to match the positional information of the digital map and the satellite image data. 5a included in the satellite image data is superimposed with a digital map representing the same region as shown in FIG. 5b, and geometrically corrected as shown in FIG. Generate video data. The geometrically corrected image data in step S7 is orthogonally corrected so that all the features can be orthogonal. (S8) The buildings included in the image data should be represented as rectangles on the map, If you are not in the center of the imaging position, there will be a relief displacement that results in different positions of the top and bottom of the building. Orthodontic correction corrects the error of the relief displacement so that the top and bottom of the building have orthogonal projection characteristics. The ortho-corrected image data in step S8 is processed into a mosaic process, that is, continuous data. (S10) The mosaic process is a process of generating one continuous data by combining several separate data. That is, the data of a narrow area is combined to generate data of a wide area. In operation S10, the mosaicized image data undergoes an image fusion process. (S12) The image fusion process combines only the merits of the monochromatic image data and the multispectral image data included in the image data, and combines the data as shown in FIG. 6. It is a process of generating. That is, the image fusion process is a process of combining the colors of the multispectral image data while maintaining the high resolution of the monochromatic image data. In operation S12, processing of various symbols, texts, and graphic information capable of distinguishing various features into data processed through an image fusion process is completed, such that a two-dimensional map as shown in FIG. 7 is completed. Insert symbols and text to distinguish water (eg banks, government offices, schools, parks) to facilitate identification of features. Text can be read visually by varying the size, color, and style of the feature according to the type of feature (eg, administrative name, building name, road name), and by different heads or colors of various buildings or roads. To facilitate. In addition, indexes as shown in Table 1 are constructed to make it easy to find buildings.

Gaewon Middle School 1B Couture Crossing 2B Seoul Japanese School 2A

Referring to Table 1, the opening middle school is indicated by 1B. Here, 1 is displayed on the right side of the two-dimensional map generated in step S14, and B is displayed on the lower side of the map. Here, the open middle school is located in a box 24 orthogonal to 1 and B. The dressmaking range is likewise located in the box 26 where 2 and B intersect. The two-dimensional map thus completed is output and used for a predetermined purpose. (S16)

In order to produce a three-dimensional map, a digital elevation model (hereinafter referred to as "DEM") is produced so that the digital map collected in step S4 includes height information. In order to add the information, as shown in FIG. 8, height information is added to each contour line extracted from the digital map. That is, the height Z is added to the X, Y coordinate values included in the contour line. Based on the DEM generated as described above, a model such as an actual index is manufactured as shown in FIG. 9. After a model such as an actual index is manufactured as shown in FIG. 9, adding 2D data generated in step S12 produces a map having a 3D orthogonal image as shown in FIG. 9. (S18) 3 generated in step S18 A video file can be generated by designating relevant factors such as the path and altitude of a specific area included in the dimensional orthogonal image. (S20) The generated video file can feel the real feeling of flying directly in the area. It can also obtain spatial information accordingly. In addition, a variety of information (for example, accumulation, legend, azimuth, etc.) is added to the map having the three-dimensional orthogonal image generated in step S18 and output, and the output map is used for a predetermined purpose. S22) If this is explained in detail, when editing an existing digital map using satellite image data, the collected satellite image data is classified into subjects (eg, buildings, roads, rivers, etc.), and then changed index information is added or Will be deleted. In addition, when creating a new map using satellite image data, first, the earthly features included in the satellite image data are classified by subject. Then, for each subject, add an attribute (for example, line thickness, color, and font style).

As described above, according to the mapping method using the image data of the satellite according to the present invention, the existing vector map can be produced as a vector map with the latest information based on the image data generated through the satellite image processing step. By superimposing vector maps on top of each other, we solve the readability problems of existing vector maps and develop unique graphic elements to create satellite image maps that maximize visual effects. In addition, it is possible to simply create a three-dimensional map using only the image data and the digital map of the satellite. In addition, since the information included in the image data of the satellite can be included in the map, a precise map can be produced.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (4)

In the method of making a map using the image data of the satellite and the two-dimensional numerical data, Geometrically correcting the image data based on the coordinate information of the numerical data so that the image data and the numerical data have the same position information after collecting the image data and the numerical data; Orthodonticly correcting the error of the undulation displacement so that the periphery of the constant image area has the characteristics of orthographic projection, A mosaic step of combining the orthodontic unit data into continuous data so that the orthodontic data appears in a large area; An image fusion step of mixing the color information of the multispectral image data while maintaining the resolution of the gray color image data included in the image data; Generating a two-dimensional map by adding and editing map information including details of a feature to the image fused data; Generating a digital elevation model such that the numerical data includes height information, and then producing a model such as an actual index based on the digital elevation model; Generating three-dimensional orthographic image data by adding the image fused data to the model; Generating a 3D map by adding map information including details of a feature to the 3D orthographic image data; And converting the 3D orthographic image data into a video by inputting path and altitude information for a specific region. The method of claim 1, The various map information included in the 2D map and the 3D map are at least one or more of a linear enzyme, various symbols, text, graphic information, accumulation, legend, and orientation for distinguishing various features. Mapping method using. The method of claim 1, Symbols inserted at upper and / or lower sides and left and / or right sides of the two-dimensional map and the three-dimensional map at predetermined intervals, and symbols inserted at the upper and / or lower side and symbols inserted at the left and / or right side. Mapping method using the image data of the satellite, characterized in that the orthogonal portion is separated into a predetermined size and used as an index. The method of claim 2, When editing the 2D map, distinguishing the features included in the image data and adding and editing the changed indicator information; When producing the two-dimensional map, the map production method using the satellite image data, comprising the step of distinguishing the features included in the image data and adding different attributes to each of the divided features; .