| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a new method of efficient processing for extracting a secondary water supply suspension area, by specifying a nested loop (the secondary water supply suspension area) in accordance with a variation in loop number in a direction along a single-stroke- drawing reciprocating path of a primary water supply suspension area. SOLUTION: A water supply system is looped according to a rule of a return at a dead-end point N9', so that right and left loop numbers in vector directions of distributing water pipes can be pre-imparted to the distributing water pipes, respectively. After the automatic extraction of the primary water supply suspension area, the variation of the round loop numbers along the single-stroke-drawing reciprocating path (a thick line part) of the primary water supply suspension area is determined; loops having a number '1' and a number '2', which are sandwiched among numbers '3 (parent loops)' generated discontinuously more than once in the variation of the round loop numbers, serve as candidates for the nested loops; and an examination is carried out as to an inclusive relation between a circumscribed rectangular area of an addition part of the parent loop 3 and the primary water supply suspension area, and a circumscribed rectangular area of each of the candidates for the nested loops. When the former includes the whole of the latter, it is determined that the candidate '2' for the nested loop is the secondary water supply suspension area.</p> |
