| The digital marine, a complicated and systemic project, is a dummy ocean world, which is composed of the large, multi-resolution, multi-temporal and multi-type space data of marine observation and the marine surveillance data and which is also made of their analysis arithmetic and model.The seismic data is one of the important basic data resources both in the research of benthal architectonic geology and in the field of oil-gas exploration and production, and it is also a basic data type in the digital marine. So, one of the basic assignments of the digital marine is to design a seismic database to manage and utilize seismic data effectively.Based on the analysis of the organization and the accessing mode and the structure of seismic data systematically, the primary design of the seismic database based on GIS and the relationship database is accomplished according to the theory of the relationship database, the object-relationship mapping(ORM) and the orient object design (OOD), combining with the geographic information system ( GIS ).First, it is about to compile the SEG-Y files. The source of the seismic database is the seismic data stored in the SEG-Y files that is the current international data format of the seismic data storage. The effectual seismic data fields are got out from SEG-Y files by compiling and breaking up the files. It is found that it is feasible to manage seismic data scientifically and effectively by using the relationship database through analyzing the structure of the seismic data and the organization mode of seismic data in SEG-Y files.Second, it deals with the design of the data storage model. According to the relationship database theory, the principle that the object schemas drive data schemas and the demand of data normalization, the design of the data schemas (seismic database) is achieved based on the object schemas formed by analyzing the real demand. On the condition that the integrity of the data is guaranteed, the technical means (such as index foundation and redundancy design) and the physical means (such as storing data in different hard disk) are used to optimize the seismic database to improve its capability.Third, the design of the data accessing model is analyzed. According to the object-relationship mapping (ORM) theory and the orient object design (OOD) principle, the design of data accessing layer (DAL) is realized by making use of the ADO.NET data accessing technology. The data access logic is encapsulated by data access object in data accessing layer that separates the Business Logic Layer (BLL) from the data source. The data accessing layer enhances the efficiency of the future program development greatly.Fourth, the design of the workspace navigation is discussed. Based on the ArcEngine development circumstance, the buffer analysis and the Containing analysis of vector data, the design of the workspace navigation comes true by using MapControl and the Eagle Program, which supports a friendly interactive interface to consumers.This system contains two prominent features:First, it can manage the seismic data through the relationship database. Thus it realizes the high efficiency, the scalability and the easiness of the maintenance of the seismic data management. In the first place, it enhances the speed of the random survey line data and the panel slice data; In the next place, it not only makes the access of the local seismic data fast, but also realizes the network sharing of data by combining relationship database technology with network technology; Finally, as a mature and commercial data persistence technology, the relationship database technology offers the guarantee for the maintenance of the database.Second, it realizes the organic integration between the mature geographic information system and the seismic database. It is beneficial for integrating the investigation data of geosciences and that of its correlative specialty. In addition, it also provides references for the design of other special databases.
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