Source: https://patents.google.com/patent/KR0156270B1/en
Timestamp: 2020-06-05 20:23:00
Document Index: 414635293

Matched Legal Cases: ['art 1', 'art 2', 'art 21', 'art 2', 'art 2', 'art 2']

KR0156270B1 - Apparatus for preparing map data with regional properties - Google Patents
Apparatus for preparing map data with regional properties Download PDF
KR0156270B1
KR0156270B1 KR1019930003337A KR930003337A KR0156270B1 KR 0156270 B1 KR0156270 B1 KR 0156270B1 KR 1019930003337 A KR1019930003337 A KR 1019930003337A KR 930003337 A KR930003337 A KR 930003337A KR 0156270 B1 KR0156270 B1 KR 0156270B1
KR1019930003337A
KR930020297A (en
겐지 니시이시가끼
1992-03-05 Priority to JP92-48706 priority Critical
1992-03-05 Priority to JP4048706A priority patent/JP2770097B2/en
1993-03-05 Application filed by 겐지 니시이시가끼 filed Critical 겐지 니시이시가끼
1993-10-19 Publication of KR930020297A publication Critical patent/KR930020297A/en
1998-11-16 Publication of KR0156270B1 publication Critical patent/KR0156270B1/en
The line data generator of this apparatus automatically reads the map image through an image scanner, generates a digital image signal with a pattern recognition module, creates line data in the line data image processing apparatus, and writes the line data to the ROM 1. Remember The data converter retrieves the line data from the line data generator, creates face data, and issues the face data to the attribute data generator. The discontinuous points of the surface data are compensated for in accordance with instructions input from the keyboard through the closed area data image processing apparatus and the attribute information creating apparatus, the attributes corresponding to the points are assigned, and the output thereof is printed. RAM (II) stores the completed data. Complement of the discontinuities of the surface data is performed simultaneously by the input terminals PCi (i = 1, 2, ..., n). By using this method, precise face data can be easily and quickly created by reading a topographical map or the like, so that the vector line data is converted into face data whose discontinuities are corrected. Therefore, the face data is completed and precise.
Map data creation method and device
FIG. 2A is a data block diagram of an L file 2a for line data conversion processing of the image vector line data generating apparatus 1. FIG.
FIG. 2B is a data block diagram of the D file 2b for closed area data image processing of the closed area attribute data generating apparatus 3. FIG.
3 is a block diagram showing the internal structure of a data conversion apparatus.
4 is an operation flowchart (part 1) of a process for creating a closed file data image processing D file 2b of the CPU.
5 is an operation flowchart (part 2) of a process for creating a closed file data image processing D file 2b of the CPU.
FIG. 6A is a diagram showing an example of image information read by the image vector line data generator 1; FIG.
6B is a diagram showing an example of a figure drawn with line data generated based on the image information.
FIG. 7 is a view showing an example of an unfinished map drawing made from surface data input to the closed area attribute data creating device 3. FIG.
FIG. 8 shows an example of a complete map plot with a number of zones complemented and identified by a number of discontinuities.
9 is a diagram illustrating an example of map information completed by assigning an attribute to a specific area.
10 is a block diagram showing a second embodiment of the present invention.
11 is a block diagram showing the configuration of PCi (i = 1,2, ..., n).
FIG. 12A is a diagram showing a D file 2b for closed area data image processing of the closed area attribute data generating apparatus 3. FIG.
Fig. 12B is a diagram showing the data of the M file 2c for correcting closed area data.
13 is an operation flowchart of a process of creating an M file 2c for correcting closed area data of a CPU.
14A and 14B illustrate line data.
The present invention relates to a method and apparatus for creating map data having regional attributes, and more particularly, to a method and apparatus for creating map information representing characteristics and attributes of regions and branches on a map.
So far, maps have used several methods to graphically represent information. Maps displaying areas or points that correspond to specific attributes in separate colors have been widely used. Such color maps include land-use situation diagrams showing the property of land such as arable land, residential area, factory area, etc. in various colors; A census zone diagram showing different regions in different colors; Soil plots in different colors for different lipids; Administrative jurisdictions showing cities and towns in different colors for each city, town, and town; Public facilities management such as electricity, water supply and sanitation are available.
These maps are widely used as educational data by schools as administrative data by local governments.
Storing such map data on a computer is useful because the map information can be updated relatively easily. Also, by storing the map data on a computer, new maps can be created by overlapping, i.e., overlapping, maps representing different kinds of information for the same map area. For example, the geological situation is checked before construction commences by overlapping the soil map on the planned road construction map. In addition, maps with information of the same attribute are used to map the progress or improvement of environmental pollution, for example, by using maps with different measurement times.
In the conventional method used to store map information in a computer, first, the input terminal of the digitizer is moved manually in connection with the edge of a figure (shown as a block and a point on the original map). In this way, the movement data read out by the input terminal is stored in the computer as surface data showing the contour of each area and point.
However, even when creating a map of land for relatively few lands in Japan (for example, Okinawa or Todori) on a scale of 1/25000, about 100,000 pieces of surface data are needed, and as mentioned above, the digitizer Input manually, which requires an enormous amount of time and effort to create the data.
In addition, each item of this surface data should form a closed surface in order to give attributes corresponding to the inputted surface data for each individual region and point through computer processing. If the contour line obtained by this plane data is discontinuous, the attribute corresponding to this plane data leaks around at this discontinuity point. On the other hand, even when the operator feels that the contour of the surface data displayed on the computer screen is continuous, the computer frequently registers that the data is discontinuous. Therefore, the operator should be extremely careful when entering face data manually using the digitizer technique, and be careful to avoid the occurrence of discontinuities. As a result, such input operations require highly skilled operators and advanced methods.
For the above reasons, 50% to 90% of the production cost of the drawing information is allocated to the manual worker. In addition, since the maps thus prepared are extremely expensive, the wide application of map information to each field is economically difficult.
In addition, since it takes several months to complete the noodle data, such noodle data had to be updated.
For contour maps, which are widely used in civil engineering and surveying, there has been a conventional apparatus for automatically correcting distortion of figures. This method takes original map data, such as used as a topographic map, through an image scanner and stores figure data on a computer. In the case of manual input operation with this system, the figure data can be updated relatively easily.
However, the above-described concept of surface data is not applied to the figure data to be processed with this apparatus. Therefore, the figure data is processed as vector data representing only lines. Another drawback of this system is that it cannot automatically detect discontinuities. In addition, if the figure data stored in the house and roads are individually recognized after being converted into vector data, and the object to be recognized through such a vector data classification is, for example, a pair of adjacent houses each of a hexagon, the adjacent house One of them cannot be identified. This is because the outline of a house cannot be decomposed into items of six line data, and such items cannot be automatically converted into vector data to be combined as a single polygon. In this case, in the conventional apparatus, it is necessary to prepare a trace diagram in which the adjacent ones are removed in advance. Doing so involves a lot of time and effort.
As described above, there is no method or apparatus for automatically generating precision map information from the original map.
SUMMARY OF THE INVENTION An object of the present invention is to provide a method and apparatus for automatically reading maps and automatically creating map data having local attributes, and creating surface data to give local attributes to the surface data.
In the present invention, first, two-dimensional vector line data is created from raster data obtained by reading an original map such as a topographical map, and automatically generates surface data composed of at least point data and line data from the vector line data; Then another set of line data corresponding to the desired set of point data or line data is generated from the discontinuities of the line data forming the surface data thus created. In this way, the closed area data corresponding to the surface data is created, displayed, printed and printed together with the attribute data corresponding to the closed area data.
In order to realize the above, the line data output means outputs two-dimensional vector line data based on raster data obtained by automatically reading a topographic map and other original maps. This line data output means includes, for example, an image scanner, a pattern recognition module, and a line data processing device (RAM).
The plane data output means outputs plane data of at least point data and line data in accordance with the vector line data output from the line data output means. This data output means is provided with a CPU (Central Processing Unit) and ROM (Read Only Memory), for example.
The closed area data output means outputs the closed area data formed by generating line data (connecting to another point or line data) from discontinuous points of the line data forming the surface data output from the surface data output means. The closed area data output means includes, for example, a personal computer.
The map data generating means inputs, classifies the closed area data (outputted from the closed area data output means) according to the given attribute data, and stores and displays the closed area data by the map data generating means. The map data generating means includes, for example, an image processing apparatus, a RAM, a keyboard, a display apparatus, and a plotter.
Finally, the control means outputs the surface data (output from the surface data output means) to the plurality of closed area data output means after the predetermined display data is assigned to the discontinuities of the line data forming the surface data. This control means also outputs closed area data (outputted from a plurality of closed area data output means) to the map data generating means.
The control means includes, for example, a ROM and other device in which a CPU program is stored.
1 is a block diagram of an embodiment of the invention.
In FIG. 1, the image vector line data generating apparatus 1 includes; An image scanner 1-1 which automatically reads original maps such as a topographical map or a circuit diagram shown in FIG. 6A and outputs an electric signal; A pattern recognition module (1-2) for receiving an electrical signal output from the image scanner (1-1) and generating a digital image signal from the electrical signal; Line data image processing apparatus (1-3) which extracts thin line data from the digital image signal generated by the pattern recognition module 1-2 to generate vector line data to create the line data image shown in FIG. 6B, for example. ); And RAM (I) 1-4 for storing vector line data created by the line data image processing apparatus as an L-file for line data image processing described later. As the image vector line data generating apparatus, NSXPRES 5000 which is a drawing automatic input CAD system sold by Sunnet Sea, Japan can be used.
The data converting apparatus 2 has an input side connected to the image vector line data generating apparatus 1 and an output side connected to the closed area attribute data generating apparatus 3.
The L-file 2a for line data image processing is read out from the image vector line data generating apparatus 1. Thereafter, the line data of the L-file 2a thus read is analyzed and output to the closed area attribute data generating apparatus 3 as a D-file 2b for image processing of the closed area data described later. As the data conversion device 2, a normal personal computer such as those sold by Fujitsu NEC IBM and the like can be used. The closed area attribute data generating apparatus 3 includes;
Closed area data image processing apparatus 3-1; RAM (II) 3-2 in which the D-file 2b for closed area data processing is stored; RAM (II) 3-2 connected to the closed area data image processing apparatus 3-1; A keyboard 3-3 which interpolates the line data in the D-file 2b for image processing of the closed area data, gives an attribute corresponding to the area or point, and inputs a command to print an output or the like; And a plotter 3-4 for printing map information in accordance with the print output data output from the closed area data image processing apparatus 3-1. As the closed area attribute data generating apparatus 3, for example, ARC / INFO developed by the American ESRI company can be used.
2A is a block diagram of an L-file 2a for line data image processing. This L-file 2a is stored in RAM (I) 1-4 of the image vector line data generating apparatus 1. 2B is a block diagram of the D-file 2b for closed area data image processing. This D-file 2b is stored in the RAM (II) 3-2 of the closed area attribute data generating apparatus 3.
The L-file 2a for the line data image processing in Fig. 2A is one record data. This recording represents a contour line or a line showing an outline of an image separately, and comprises a header portion 21 and a data portion 22. This header portion 21 includes: a glass portion 21-1 representing a glass of recording; A code part 21-2 indicating a configuration of a line indicated by recording and the like; And a list portion 21-3 indicating the length of the data portion 22. As shown in FIG. The data portion 22 is a parameter portion (i) 22-i (i = 1,2, ..., n) that stores coordinate data representing a line. In this line data, for example, the cross image shown in Fig. 14A can be represented by two sets of line data (lines A and B). Line A connects point (X a-0 , Y a-0 ) and point (X a-1 , Y a-1 ), and line B connects point (Xb-0, Yb-0) and point (Xb- 1, Yb-1) can be connected, and as shown in FIG. 14B, the line at the intersection of the cross image can be decomposed into four line data (line A, line B, line C, line D). In addition, the line data may be represented by the dashes (AB, DC).
The line data image processing apparatus 1-3 reads the L-files 2a sequentially from the RAM (I) 1-4 for data image processing as necessary, and outputs a graphic as data as shown in FIG. 6B. can do.
In addition, the D-file 2b for the closed-region data image processing in FIG. 2B has a very different file configuration from the L-file 2a for the line-data image processing in FIG. 2A. It has the same structure as a DLG file. That is, the D-file 2b for the closed region data image processing in FIG. 2B includes a header portion 2b-1 for storing data indicating the file structure; A point data section 2b-2 for storing point data indicating a bending or bending point of the polygonal line; And an area data section 2b-3 for storing data indicating at least one attribute of the closed area and a line-data section 2b-4 for storing line data.
Next, the internal structure of the data converter 2 is shown in FIG. As shown in FIG. 3, the data conversion apparatus 2 includes a CPU 31 having a microprocessor and a ROM 32 for storing a program. In accordance with the program stored in the ROM 32, the CPU 31 converts the data of the L-file 2a for line data image processing into a D-file 2b for closed area image processing.
Now, using the flowcharts of FIGS. 4 and 5, the operation method and the data of the CPU 31 (the L-file 2a for the line data image processing to the D-file 2b for the closed region data image processing) are described. I will explain the flow of data within the transform). The method of operation and the flow of data are realized using registers i, j (not shown).
In Fig. 4, the L-rupture 2a for line data image processing is read in step S1. Next, in step S2, the number of elements is read from the list portion 21-3 of the file header portion 21 and stored in the register i. Subsequently, the value of the register i is determined. If the value is not zero, there is an element to be read, and the flow proceeds to step S5. In step S5, the element write i is read, the element data at the head of the element i is read and stored in the register j. Next, the value of the register j is determined in step S6. When these values are 1-7, step S7-step S13 are performed, respectively. The coordinate data stored next to the element value data of the element recording j is read out, and the read coordinate data is transferred to the line data 2b-4 of the D-file 2b for the closed area data image processing, and then to a predetermined position. Fill in
The value of the register (j) is in the range of 1 to 7, each of a straight line, a one-point bending polygon, a two-point bending polygon, … , 7-point bending polygons and 8-point bending polygons are shown.
If the value of the register j is greater than 7, in step S6, the type of element represents out-of-line data, and in this case, the process immediately proceeds to step S14.
Next, in step S3, if the value of the register j is 0, the entire element recording is already read and the figure processing ends. In this case, the flow advances to step S15 to create surface data. This routine ends the processing.
The process of creating face data will now be described using the flowchart in FIG. First, the line data created in the closed area data image processing D-file 2b in step S51 is read out and decomposed into line segments through a decomposition process. In this decomposition process, the read line data is divided at the intersection point where the line data is crossed by the remaining line data and the contact point and the remaining line data, and decomposed into a line segment having no contact point and no intersection point. Assign to the line segment.
The flow advances to step S52 to determine the types of the start and end points of the line segment. In order to make a line segment through this processing operation, the starting point and the end point of each line segment without a contact or intersection point are separated (not connected to other line data), branching point (i.e. contact point), or intermediate point (i.e. Bend points of polygon lines) and register according to the category.
Next, in step S53, these line segments are classified based on the starting point and the end point, and then, in step S54, these classified line segments are connected in a constant direction. This connection direction is clockwise or counterclockwise. There exist many line segments which have the same viewpoint connected when the end point of a line segment is a branch point. Since the connection direction is determined in a certain direction in advance, a desired line segment forming common plane data can be automatically classified among these multiple line segments, and the desired line segments are connected.
Subsequently, in step S55, the type of the point of the end point of the connected line segment is determined. If the coordinate is the same as the start point of the minimum line segment or is an isolated point where there is no line segment to be connected next, the connection process is terminated and the process proceeds to step S56.
In step S56, the plane data number is assigned to the plane data constituted by the connected series of line segments and stored in the closed area data image processing D-file 2b.
If the type of the end point of the line segment connected in the previous step S55 is not the same coordinate as the start point of the first line segment and is not an isolated point, the flow returns to step S54 to connect the next line segment.
The closed area data image processing apparatus 3-1 in FIG. 1 reads the surface data converted from the line data as described above and stored in the line data portion 2b-4 of the D-file 2b for closed area data image processing. As shown in FIG. 7, a graphic of a map is displayed on a CRT display device (not shown).
Incidentally, arrows A, B,. … (Not shown) connected to a cursor key or keyboard 3-3, not shown, of the keyboard 3-3 so that the discontinuity of the line indicated by F is blinked by a predetermined mark, and the discontinuity of the line is removed by a correct process. Corrective input is enabled by a mouse terminal.
In this way, the corrected and corrected correctly interpolated closed area data is again stored in the line data portion 2b-4 of the closed area data image processing D-file 2b. At the same time, the corresponding point data of the point data section 2b-2 of the same D-file 2b is also automatically corrected and stored again.
For the map graphic data composed of only the closed areas prepared as described above, in order to identify each area or point represented by the closed area using the keyboard (3-3), the closed area on those maps is similar to that shown in FIG. The same number (shown in a circle) is automatically assigned collectively. This number is stored in the corresponding position of the area data portion 2b-3 of the same file. In addition, by inputting data representing an attribute for this number, an attribute is given to an area or a point identified by the number. This attribute data is also stored in the corresponding position of the area data section 2b-3 of the same file to complete predetermined map information.
The closed area data image processing D-file 2b of the RAM (II) thus created is read by the closed area data image processing apparatus 3-1 in FIG. 1 and passes through the plotter 3-4 as map information. Is output. The image by this output takes the form of the land use situation chart shown, for example in FIG.
As described above, the present invention can accomplish the creation of a map in a few days, even if it requires months.
In the above embodiment of the present invention, the discontinuity portion of the incomplete map drawing is compensated to be closed properly by using the closed area attribute data generating apparatus 3, but for example, the relatively small size of the Even if a land use situation chart is drawn, there are approximately 100,000 pieces of surface data, and the display screen for correction input has a structure of tens of screens. It takes a lot of time to perform these tens of screen modifications in one device, and thus it is not possible to sufficiently realize the effect of significantly shortening the working time by automating the surface data creation work.
Therefore, this correction operation is distributed to a plurality of correction data input devices, modified, and the corrected map data is input again to the closed area attribute data creating device 3, and the closed area attribute data creating device 3 is inputted. Subsequent attribute assignment processing is performed. This is realized in the following second embodiment of the present invention.
A second embodiment of the present invention for realizing the above concept will be described below. 10 is a block diagram of a second embodiment of the present invention.
The same reference numerals are given to the same parts as those of the first embodiment of the present invention shown in FIG.
In FIG. 10, the data conversion apparatus 2 includes a plurality of personal computers 4-1 (PC1), 4-2,... … , 4-n (PCn)]. Of course, an ordinary terminal device can be used instead of the personal computer.
The data converting apparatus 2 is a closed region data image processing D-file 2b created in accordance with the line data image processing L-file 2a output from the image vector line data generating apparatus 1, and described later. An area data correction M-file 2c is created, divided into one display screen, and output to each personal computer PCi (i = 1, 2, ..., n), and each personal computer PCi. The corrected data to be output is output to the closed area attribute data generating apparatus 3 as data of the closed area data image processing D-file 2b.
11 is a block diagram of the personal computer PCi. In Fig. 11, the CPU 4-i-1 includes a microprocessor and controls the entire system in accordance with a program stored in the ROM 4-1-2. The ROM 4-i-2 includes an M-file 20 for closed area data correction processing and a work storage area. In accordance with the control command output from the CPU 4-i-1, the CRT (i.e., CRT) 4-i-1 is an M-file for the closed area data correction processing of the RAM 4-i-3. Data (2c) of the map shown in Fig. 7 is displayed. The mouse 4-i-5 controls the cursor at a desired point on the screen of the CRT 4-i-4 and allows input of coordinate values for the point.
FIG. 12A shows a D-file 2b for closed area data image processing shown in FIG. 2B. Fig. 13B shows the data structure of the M-file 2c for closed area data correction processing. The M-file 2c is created in accordance with the D-file 2b for closed area data image processing.
In the same figure (FIGS. 12A and 12B), the M-file 2c for closed area data correction processing includes a file number part 2b which stores a file number for identifying a data factor read from any D-file 2b. -One) ; Isolation point data portion 2c-2 and D-file for storing predetermined data (small yellow circular mark) placed around the isolated data (discontinuous point) coordinates detected in point data and line data of d-file 2b. The line data section 2c-4 stores line data read out from the line data in (2b).
Now, with reference to the flowchart shown in FIG. 13, the operation of creating the closed area data correction M-file 2c performed by the data conversion apparatus 2 for the second embodiment of the present invention having the above structure is shown. I will explain.
In FIG. 13, the closed area data image processing D-file 2b is read in step S1201, and a file number corresponding to the read D-file 2b in accordance with the data of the header portion 2b-1 is created. The file number part 2c-1 of the M-file 2c for closing area data correction is stored.
Next, the process proceeds to step S1202, and it is determined whether the file is to end. If the file does not end, the process proceeds to step S1203 to sequentially read the data of the D-file 2b, and the read data is the point data (D-file). It is discriminated whether or not it is data read from the point data section 2b-2 of (2b) or line data (data read from the line data section 2b-4 of the D-file 2b).
If the data read out through the determination is point data, the flow advances to step S1204 to determine whether the point data indicates an isolated point.
This determination determines whether or not there are two or more line data connecting the point data to the other point data. If the number of line data is two, the point data in question corresponds to the bending point of the polygonal line. If the number of line data is 2 or more, the point data in question represents a contact point (i.e., a concentration point or a scatter point). Thus, in both cases, the point data in question is identified as not an isolated point. When there is only one line data from the point data, the point data is identified as an isolated point.
If the point data is determined as an isolated point, the process proceeds to step S1205 to read the coordinates of the isolated point, and then proceeds to step S1206 to create the original data having a predetermined radius centered on the isolated point, and closes the original data. It stores in the isolated point data part 2c-2 of the area data correction M-file 2c, and returns to step S1202 mentioned above.
If the determination of step S1203 identifies that it is not an isolated point, the operation immediately returns to step S1202.
When the data is read out by the determination of step S1203, the flow advances to step S1207 to determine the type of line data. And a straight line (two coordinates), a one-point bend line (three coordinates),. , 6-point bending line (7 coordinates) or 7-point or higher bending line (coordinates 8 points or more) is discriminated, and the steps S1208, S1209,... The flow proceeds to S1213 or step S1214. Then, the point coordinates constituting the line data are read out and the steps S1208 ', S1209',... In step S1213 'or S1214', the sun data, which is the read point data, is stored in the sun data portion 2c-3 of the M-file 2c for closed area data correction, and the flow returns to step S1201.
If the file is finished in step S1202, the operation ends.
The closed area data correction M-files 2c thus produced are output to the personal computers PC1, PC2, ..., PCn in FIG. 10, and they (PCi) (i = 1, 2, 3, ..., n). Is displayed on the screen. The operator identifies the discontinuous points of the map figure by the circle symbol representing the isolated point, and if the discontinuity is too small for the operator to identify it, the operator enlarges the display and uses the mouse to supplement the discontinuity. The complemented data is stored as the new line data in the line data section 2c-3 of the M-file 2c for correcting the closed area data, read by the data converting apparatus 2 after completion of work, and creating the closed area attribute data. Output to the apparatus 3.
In the above embodiments, the creation of the map data has been described, but the present invention is not limited to the drafting data. With respect to the circuit pattern shown in FIG. 6B, an attribute may be provided to each part of the circuit pattern as a closed region in the same manner as the above embodiments. Thus, each lung region can be colored to easily distinguish each lung region from each other.
Modifications and applications of other embodiments will be included within the spirit and scope of the invention.
Although the present invention has been described with reference to the above two embodiments, it is to be understood that additional embodiments, applications and modifications which are skilled in the art will fall within the spirit and scope of the present invention.
Two-dimensional vector line data is created based on raster data obtained by reading the original map, and automatically creates surface data consisting of at least point data and line data based on the vector line data, and the line data constituting the surface data. The closed area data corresponding to the surface data is created by generating the line data obtained by connecting the discontinuous points of the data to any other point data or line data, and storing and displaying the closed area data together with the attribute data attached thereto. Or creating map data to be printed.
Image vector line data generating means (1) for outputting two-dimensional vector data in accordance with raster data obtained by automatically reading a raw figure such as a topographical map, and vector vector line data output from the image vector line data generating means (1). By generating data conversion means (2) for generating and outputting surface data, which is generated at least of point data and line data, and line data connecting discontinuous points of line data constituting the surface data to other point data or line data. And a closed area attribute data creating means (3) for storing, displaying, and printing the closed area data corresponding to various attribute data formed and inputted therein.
3. The line data output by the image vector line data generating means (1) according to claim 2, wherein the line data output by the image vector line data generating means (1) is one record data indicating the outline of the image, and the one record data is the header portion (21) and the data portion (22). ), The header portion is a glass portion 21-1 indicating the class of the recording, a code portion 21-2 indicating the linear form of the recording, and a list portion 21-3 indicating the number of elements of the data portion. And said data portion comprises a plurality of parameter portions (22-i) for storing element recording coordinate data indicating a line.
3. The surface data output by the data converting means (2) is based on the D-file (2b), and includes a header portion (2b-1) for storing data indicative of the file structure, and a start point and an end point of a figure line. A point data section 2b-2 for storing a point data section pointing to an area, an area data section 2b-3 for storing data indicating at least one attribute of a closed area, and a line data section 2b-4 for storing line data Map data creation device characterized in that.
3. The data conversion means (2) according to claim 2, wherein said data conversion means (2) reads said element records from said data portion in turn, reads element type data at the head of said element record, and reads coordinate data read after said element type data. And store the analyzed coordinate data in a predetermined area of the line data unit according to the file structure of the D-file, read one recording line data output by the line data generating means 1, and read the header. And the surface data is generated by reading the number of element records from the list unit.
The map data creating device according to claim 2, wherein the original map is a topographic map.
The map data creating device according to claim 2, wherein the original map is an aerial photograph map.
3. An apparatus for producing map data according to claim 2, wherein said plane data is at least point data and line data.
3. The plurality of closed areas according to claim 2, wherein the closed area data is completed and output as closed area data by generating the line data connecting the point of discontinuity of the line data forming the surface data to another point data or line data. A vector which further comprises data output means 4-1, 4-2, ..., 4-n, wherein said data converting means 2 generates said surface data and is output from said image vector line data generating means 1; Dividing the surface data of at least point data and line data generated in accordance with the data into a plurality of individual surface data, and assigning predetermined display data to the discrete point data for the line data forming the divided individual surface data; Outputting the individual surface data to each of the closed area data output means 4-1, 4-2, ..., 4-n, and outputting the closed area data to the closed area attribute data creating means 3; Map data creation device.
KR1019930003337A 1991-06-24 1993-03-05 Apparatus for preparing map data with regional properties KR0156270B1 (en)
JP92-48706 1992-03-05
JP4048706A JP2770097B2 (en) 1991-06-24 1992-03-05 Map data creation method and device
KR930020297A KR930020297A (en) 1993-10-19
KR0156270B1 true KR0156270B1 (en) 1998-11-16
ID=12810765
KR1019930003337A KR0156270B1 (en) 1991-06-24 1993-03-05 Apparatus for preparing map data with regional properties
US (1) US5377102A (en)
EP (1) EP0559294B1 (en)
KR (1) KR0156270B1 (en)
AU (1) AU663566B2 (en)
DE (2) DE69329565D1 (en)
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GB2266024B (en) 1995-05-24
AU663566B2 (en) 1995-10-12
KR930020297A (en) 1993-10-19
AU3403193A (en) 1993-09-09
US5377102A (en) 1994-12-27
EP0559294A2 (en) 1993-09-08
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DE69329565T2 (en) 2001-05-31
EP0559294A3 (en) 1995-05-10
GB2266024A (en) 1993-10-13
US7554462B2 (en) 2009-06-30 Information updating device, its method, its program and storing medium storing the program
KR20020007172A (en) 2002-01-26 Computer automated process for analysing and interpreting engineering drawings
EP1246124A2 (en) 2002-10-02 Image space display method and apparatus
Stoter et al. 2010 State-of-the-art of automated generalisation in commercial software
Siebert 2000 Using GIS to document, visualize, and interpret Tokyo’s spatial history
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