| "Digital earth" had suffered extensively concerning of people from putting forward, and how to develop "digital earth" of our country, and has become one of the important research subjects at present time. Meanwhile, the positive step was stepped in GIS's technology of our country, geographic information industrialization, the construction of Fundamental geo-spatial database establishment and gains the notable progress. With the largest irrigation works of our country - "south to north water transfers engineering " starts, and digital south to north water transfers engineering " is arisen at the historic moment .As the theory and practice of "digital earth" in our country, " digital south to north water transfers engineering " promoted the digitize course of large-scale irrigation works , construction of " digital China " and " digital province " as well as the important Component of "digital city" of present our country beyond doubt , and quickened geographical information technology research of our country to build visualization, network and intelligentize at the digitize. For the sake of achieving this objective , the found of "digital south to north water transfers engineering "is need to be had the good space data base to come to put up to realize, and the establishment of the space data base system of geographical information systems is a complicated course, this trial groped out one set of complete settlement scheme studied for the future inside the scope of the whole nation the full-scale data acquisition and is built the warehouse , including the data acquisition method, production management, equipment disposition and related software and data base management etc , and made a good foundation in open-minded this work for completely .This article with the course of research and construct to the foundation database of "digital south to north water transfers engineering" being the research background, and takes the system theory as the guidance, and the many branches of learning technology such as geographical information system technology , remote sensing technique, data base technology and network technology etc is used in the synthesis, and theory and method of application system engineering by way of the analysis to user' s requirement and data sources, to design the data warehouse from concept, logic as well as physics, was built to based on the space data base of SDE. Takes this as the basis, and has been in progress the design to the system of "digital south to north water transfersengineering" foundation data base and the management structure further. At the same time, the data that involve to the standardization of building the warehouse at the data acquisition and organization, data classifications and code, metadata as well as data quality control etc aspect , has carried on research and discussion , satisfied the shared requirements of data . Finally, space engine ArcSDE with Arclnfo software links customer end and data warehouse, and has carried on the initial integration to the data warehouses, and realized that the full relation manages of data base, and built to based on the network system of C / S structure, and realized the magnanimity storage of data, and satisfies the parallel operation of many users. And for the system safely steady operating, the angle from the data base management is set out, to have been in progress the design safety and recovering and preparing sake etc of data. After building up the data base was certainly introduced to aspect the application in the irrigation works of the data warehouse , particularly the application in the irrgation works of the digital.Landscape established by the technology of Visual Reality(V-R),and the forecast to this system development for the future at the same time. |
