JP2573758B2 - Data search method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data retrieval system, and more particularly to a data retrieval system for data managed geographically or locationally.

[0002]

2. Description of the Related Art Conventionally, as this type of data search method, a method of inputting an index item serving as an index of a target data record from an input device such as a keyboard is generally used. In a map information system or the like, a method is used in which an image of a map itself is displayed on a CRT device based on image data or vector data, and a target data record is searched using the image.

[0003]

In the above-mentioned conventional data search method, in the method of inputting an index item, an index item is limited to a relative distance or a series of numbers associated with a place name or the like. However, there is a disadvantage that the input itself of the index item of the data record to be searched is very difficult for the operator to handle. In addition, the search method based on image data and vector data requires a great deal of man-hours to input the image data and vector data necessary to assist the search, and requires special input / output devices and large-capacity external storage. Since it requires an apparatus, there is a problem that it is difficult to obtain an economic effect in terms of facilities and operation.

[0004]

According to the data search method of the present invention, in a data search method for data managed geographically or positionally, a positional element and a graphic included in a data record from a data record group to be managed are included. Graphic display means for extracting a graphical element and drawing it on a CRT device by graphic processing, storing coordinate data records in which coordinate values of the CRT display correspond to index items of the data records, and A coordinate input means for obtaining a coordinate value by pointing out a figure displayed as a drawing by a pointing device, detecting an index item of the data record through the coordinate data record based on the coordinate value, and detecting the coordinate input means. CRT device for searching a data record to be searched from the data record group using the index item Composed of a data output means for outputting.

[0005]

Next, the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention, and shows a case where the present invention is applied to a search for maintenance ledger data required by a railway maintenance department of an electric railway company. The embodiment shown in FIG. 1 comprises graphic display means 1, coordinate input means 2, data output means 3, track keeping data file 4, mouse input device 5, CRT device 6, and coordinate data file 7. The track maintenance data file 4 is a set of data records having information such as track materials of railway tracks, configurations and materials of various facilities, and maintenance histories, all of which are indexed by positional information from a base point. I have. The coordinate data file 7 is a coordinate data record in which the coordinate position on the CRT device 6 when the data record extracted from the track keeping ledger data file 4 is displayed as a graphic by the graphic display means 1 is associated with the index item of the data record. It is stored.

FIG. 2 is a flowchart of the processing of the embodiment of FIG. 1. The processing of the embodiment will be described below with reference to FIG.
When a display command for a geographical section in the graphic display means 1 is given, the graphic display means 1 extracts a data record of a specified geographical section from the track book data file 4 based on the position information of the data record. (Step 11).
Next, from the extracted data records, elements necessary for display as a graphic, for example, positions, lengths, attributes, and the like are selected and edited into graphic data of the graphic display on the screen (step 12). This graphic data is composed of coordinate values, but the type of the graphic is predetermined. For example, the track is a single horizontal line, the platform is a rectangle along the track, the gutter is also a horizontal line along the track, a bridge, a viaduct, etc. , Tunnels are also determined so that they are displayed as rectangles along the lines. Next, one data record is calculated as one figure from the calculated coordinate
Output to the T device 6 (step 13). At this time, the coordinate range in which the entire area of the figure can be determined is linked to the index item of the data record of the actual track book and stored as a coordinate data record in the coordinate data file 7 (step 1).
4). The above steps 11 to 4 are performed until all the data records of the track book data file 4 existing in the designated geographical section are extracted (step 15). The term “geographical section” means CRT
A section that can be simultaneously displayed on the device 6.

Each figure displayed on the CRT device 6 is based on the position information of the data record of the track book data file 4, so that an aggregate thereof has a drawing role. Therefore, retrieval of a data record need only point out each figure displayed in the simplified drawing. The mouse input device 5 is used for this indication, and the coordinate input means 2 obtains the indicated coordinate values from the mouse input device 5 (step 21). The coordinate input means 2 searches the coordinate data file 7 for which figure on the CRT device 6 is pointed out based on the input coordinate value, and finds an index entry of the data record of the track book data file 4 from the matching coordinate data record. Obtain (step 22).

The data output means 3 receives the index entry searched from the coordinate input means 2, searches the maintenance ledger data file 4 by this index entry, and obtains a data record to be searched (step 31). Next, the data record is output to the CRT device 6 as character information (step 32).

[0010]

As described above, according to the present invention, a data record having position information of a designated geographical area of a data file is displayed in a simplified drawing, and the displayed figure is indicated by a mouse device or the like. Therefore, since the data record is searched from the data file, the search can be performed for the part involving human labor only by the graphic display by the mouse, and the data search can be efficiently searched. Also, in terms of facilities and operation, since special data is not required and only data groups to be managed are handled, there is a great effect on cost reduction.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is a flowchart of a process of the embodiment of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Graphic display means 2 Coordinate input means 3 Data output means 4 Track book data file 5 Mouse input device 6 CRT device 7 Coordinate data file

Claims (1)

(57) [Claims] In a data retrieval system for data managed geographically or positionally, a positional element and a graphic element of a data record are extracted from a data record group to be managed, and the CRT device is graphic-processed to a CRT device. A graphic display means for performing drawing display and storing a coordinate data record in which coordinate values of the CRT display correspond to index items of the data record; and a pointing device for pointing a graphic drawn and displayed on the CRT device. Coordinate input means for obtaining an index item of the data record through the coordinate data record based on the coordinate value, and a search purpose from the data record group by the index item detected by the coordinate input means. And data output means for searching for a data record to be output and outputting it to a CRT device. The data search method to be used.