| In recent years, the international community has proposed the concept of information visualization. With the increasing of information rapidly, in addition to the need for massive data storage, transmission, retrieval and classification, the users need to understand the relationship between data urgently and find the hidden regular of mass data, so as to provide a basis for decision-making. This has become a new hotspot of data visualization technology.With more than 40 years of exploration and production,Daqing oilfield has accumulated a huge amount of data in various format.In the past ,the software targeted at specific professional data,the services domain and users were very limited,it is difficult for users to have a space architecture concept that integrated professional data and application systems , is not fit for the overall consideration and decision-making.This paper studies will avoid these limits to break the barriers among the professional data and make the data display intuitively.It was more easier for users to understand the meaning of data.Based on the existed various of distributed homogeneous and heterogeneous databases, using metadata and metamodel theory to achieve professional and convenient data visualization on WebGIS platform.This paper gives a feasible information visualization systems framework and solutions, and under the guidance of the framework and solutions, all kinds of metamodels are built, such as metamodel of data structure, common graphical visualization metamodel, access control meatmodel and management metamodel. The visualization platform provides a number of different metadata to integrate professional data source. With the help of thes metamodels, we have completed the field of functions of information visualization and afforded the technical staff and experts an information system that integrated space data and professional data, enhanced the efficiency and level of enterprise comprehensive research and management decision-making.The results of this dissertation are not only applicable to this information system, but also useful for other homothetic visual systems. The paper has described in detail on the modeling process, and wish that the paper's research and practice can provide a reference for other information systems'construction. |
