The Study Of The 3D Visualization Of City Water Supplying Network Based On Geographic Information System

City water supplying network is the most important infrastructural facilities by supporting and guaranteeing the manufacture and the lives of the city residents. Currently the great majority city adopt a traditional artificial management's method already hardly satisfy the supplying network effective demand. Based on the visual function of GIS and supported by landform, it can achieve the visual and dynamic simulation. Correct analysis and finding out about systematic running situation in an all-round way,it can not merely improve the efficiency,quality and level of management of pipe network. And also provide scientific basis and technical support for renovation and extension, running, maintenance,management of water pipe network for the city in the future.This paper are supported by two projects: the optimization design of water supplying network in Fugu county of Shaanxi province,and the Visual management about the pressure of water supplying network in Xi'an city. According to the study process on GIS and the visualization of pipe network domestic and international, and using the ArcGIS,it analyzes the problems in the city water supplying network management,and studies the 3D visualization of city water supplying network. The main achievements made in the study are as follows:(1) Using the ArcGIS,it can deposit the spatial data as shapefile. The attribute data are carried out by Microsoft Access. And the incorporate concatenation of them is achieved by Object ID. The interface is designed by VB. Based on that,the main function of management comes true, including:editing, searching, statistic,visual analyses and report forms.(2) Based on the area of landform about water supplying network in Fugu county of Shaanxi province,the Digital elevation model is established,the data are checked in MapGIS and the landform(Water Source Field→the first waterworks→the second waterworks)are showed by 3D figure in ArcScene. On this condition,the laying of the branch of pipe network are come true,it also achieves superposition between the landform and pipe network,and it nails down the detailed position about the pipe network.(3) On the running condition,analyzing the hydraulic character about pipe network and utilizing the measured pressure data for 42 points,using the ArcGIS in GIS technique,they combine ArcMap with Raster 2 Vectors(R2V)vector software, and carry out gathering flat surface marking diagram,two dimensional color diagram and 3D diagram as the integral whole 3D water pressure perspective diagram of the network. Finally,the running of pipe network is reflected directly.(4) On the designing condition,according to the result of hydraulic calculation,there are three phases and three working conditions,including:current year,recent year, long-term year and the maximum hourly water consumption when it is transferring, the maximum hourly water consumption when it is fire protection,the maximum hourly water consumption when the pipe are spoiled in the worst situation. On this basis it achieves the 2D subarea and pigmentation display about water pressure. The simulation of water pressure distributing and the visual analyses comes true by sufer,For waterworks in Fugu county,it also offers the referenced gist to put up the design on renovation and extension in city.