The Design And Implementation Of Urban Underground Pipe Network Comprehensive Geographic Information System

This thesis introduces the concept and the present development condition of the urban geographic information system first, and points out that the urban underground pipeline network GIS is an important part of urban geographic information system. This thesis analyses the current management actuality of underground pipeline network, and clarifies the necessity and the superiority that applying GIS technique to the management of urban underground pipeline network. According to the analytical and research on the current main urban underground pipeline network comprehensive GIS, puts forward the main contents of the thesis research.The underground pipeline network data pretreatment and the database design are the premise and foundation of building up the underground pipeline network comprehensive GIS, the thesis introduces the contents and method of the pipeline network data pretreatment first. Spatial database design is the core of the development and design of underground pipeline network comprehensive GIS. Most of current underground pipeline network use file-relation data models, for those shortages that these models have in network spatial analysis, the paper develops an object-oriented data model design method, and puts forward a practical object-oriented comprehensive underground pipeline network data model, on the basis of which, the paper realizes the integrative management of the spatial data and property data of underground pipeline network and the design of comprehensive underground pipeline network data structure by means of using the spatial database component Oracle Spatial of the object-object database Oracle.The thesis focuses on the overall design of the urban underground pipeline network comprehensive GIS and the design and implementation of the function modules. The thesis discusses the principle and target of system overall design, and then completes the system total structure design, graphic display, edit, search, section analysis, spatial measurement, statistical forms output, 3D display and so on according to the system total target, the design principle and the customer demand.Analysis of pipe burst is one of the important spatial analysis functions of underground pipeline network comprehensive GIS, the thesis puts forward the main assignment of pipe burst analysis, and analyzes the character of the usher nodes and the retral nodes of arborescent pipe network. The paper realizes the valve topological analysis of the pipe network. Then the paper completes the algorithm implementation of the pipe burst shutdown valve. At last , an example is given.In the end, the author sums up the main work of the thesis and puts forward the work need to do in the future.