| 摘要 |
PROBLEM TO BE SOLVED: To shorten the display processing time in the case, the distance between the objects becomes very large following the increase in the display scale. SOLUTION: At the generation of a section date with a facility data maintenance process, a sequence line of major points (sequential aggregation of one writing of poles at the end points and branching points) is set. In Fig. 2, the single continuous-writing progresses in the sequence of (1) (3) (5) NULL (3) (6), namely (1) (2) (3) (4) (5) and after it reaches the end (5), the sequence returns to the intermediate branching point (3) to proceeds to the another route in the sequence of (3) (9) (8) (7) (6). In this case, only the end points and branching points are stored in the sequence line. At displaying the line diagram, the congesting levels of the system facility is determined. When the line diagram is not so congested, the existing section data is use to display the solid line diagram of Fig. 2. When the line diagram is congested, the dotted line diagram of Fig. 2 is displayed using the major points sequential line data. Since the distance between display objects is rapidly reduced, high-speed display can be realized. |
