Based On Gis In The Digital South Underlying Database Design And Application Of Research

In the country south to north water transfer project is a great meaure to optimizely configurate water resource,and a strategically fundamental installation project to solve the using water problem of city and countryside life,industry and agriculture,irnproving ecological environment in the north of China and northwest region.The thesis takes the middle line of water transfer in Hebei province as an example,under the principle of digital water transfer I structure the whole thesis ,make clear Hebei digital water transfer relating to the specialty of data,primarily design the basic database'starget,criteria,principle,data model and metadata,etc.Based on that ,it is detailedly designed from three layer including reality world.concept world and computer world.The basic spatial database has been established by the "4D" product;and attribute database has been finished by Microsoft Access,etc.Besides,the thesis discussed further the topology rules which spatial data enter Oracle spatial by ArcSDE,and that the conjunction of spatial attribute data is realized seamlessly by setting a main-keyqord in the database.Heibei digital water transfer the basic database construction is a bran-new attempt that modern database manage technology apply for large manual irrigation project,a successful design and establishment of database is the basic work of Heibei digital water transfer GIS construction,and the quality of the basic database construction will directly affect the whole capability of system.The thesis describes how to construct system and the application in construction and manage phase,for example,land occupation statistics,optimal path analysis,control flood and reducing damage,water dispatch timely.etc.The system service for supporting decision of south to north water transfer project.