The Application And Research Of The GIS Technology In The Water Supply Pipe Network

This article introduces the GIS (Geographic Information System) and the ComGIS (Component object module GIS) concepts; it analyzes the GIS main technologies and expatiates the knowledge background and main content of the topic. Also, it describes the procedure of the water supply pipe network system (SPNS) analysis, design and practical use, including the core technologies and innovation methods which related to the procedure, and how the technologies and methods help the research and developing of the SPNS dual mode: C/S and B/S.This article discusses the GIS technology in the water supply pipe network application; learn from designing system framing, spatial inquiry, and spatial analysis functions, so as to finalize an entire module GIS system. Thus, it carries on a more thorough elaboration on the module technology. It also introduces the GIS space geometry entity and the construction of data.The article expatiate the building of the system development's software environment, including the installation and the setting of the system environment variable. The system selects the module type geographic information system software—GeoMedia, through the language of VB develop the system of C/S pattern, has completed the function of the inquiry, the searches, the statistical, the spatial analysis situs analysis and applied analysis and so on. Has studied the development water supply pipe network geographic information system essential technology with emphasis, such as the chart level management mechanism, the increase topographic diagram, intellectualized turn off the valve, data conversion from the MapInfo file formats to the GeoMedia file formats, have fully used the GIS spatial analysis function. And then in the base of GeoMedia WebMap application software, similarly uses the module type technology down to realize this system B/S pattern development in the ASP.net language environment, completes the map release in the network, may carry out the browsing, the inquiry, the revision in the network to the map.This article also detailed elaborates the system main innovation spot, such as Multi-framing Technology in water supply pipe network programming system application, GeoMedia WebMap on ASP.NET seal. A detailed introduction is made at the end of the article, reffering to the multilayered struct technology and GeoMedia WebMap the realization process which seals on ASP.NET.