GPSWP-The Graphic Process System of Water Supply Pipe Network for City

A disposal system-GPSWP has been designed in this paper, which isused to design water supply pipe network for city. The establishment of systematic structure and its way of realization have been mainly expounded here. The major functions initially completed on computer IBM-AT include the input and output of urban-street drawing and water-supply pipe net drawing and the management of graphic base. It also has the function of semi-automatic measurement mark and vec tor Chinese character mark. To solve the problem of graph-combination, the exte nding combination algorithm has also been put forward and realized based on the system.