Research And Practice On The Method Of Geo-data Integration Based On Mas

With the broad application and popularization of GIS in so many industries, the multi-source and diversity of geo-data is more and more obvious. Especially the development of the computer internet and Web Service,the reseach of data integration has turn from datafile-based,database-based into service-objected. This paper does research on the theory and method of Geo-Data Integration based on the theory of Geo-Data Service and Agent, designes and realizes the system of Civil Defense Geo-Data Integration. Main content are as follows:1,It introduces the reason,ground and the significance of of Geo-Data Integration,analyzes the phylogeny and the status quo of the research home and overseas.It contrasts the advantage and disadvantage in the research of Geo-Data Integration, analyzes the problems in the current research, and points out that Geo-Data Integration of Service-Objected is the trend nowdays.2,It introduces the concept and architecture of Web Sercice,the architecture of Geo-Information Service; analyzes the three criterion in OGC: WMS,WFS,WCS, expatiates how to express Geo Data in GML; introduces the concept,characteristic and structure of Agent, analyzes the characteristic of Mobile Agent and Multi-Agent System.3,It analyzes the problems existed in the traditional mode of Geo-Data Integration of Geo-Data Service Objected, brings forward the mode of Geo-Data Integration based on MAS, this mode do better in stability,efficiency and automatization of Geo-Data Integration system,comparing with the traditional mode.4,Under this mode,an architecture for Civil Defense Geo-Data Integration has been brought forward in this paper; Based on the analysis of existing Geo-Data in the Civil Defense system; this paper classifes the Geo-Data in three kinds,they are Base Geo Information, Civil Defense Theme Information, Correlative Specialty Layer; Using the implement criterion of OGC Geo-Data Intergration for reference, three Geo-Data Sercie:WMS,WFS,WCS has been designed and realized in this paper; designs the public pattern for Civil Defense Geo-Data Integration and the database structure for metadata dictionary.5,This paper compartmentalizes and designs the function of the Agents in MAS;enables the mobile agent moving from one host to another host, to complete their task,by using the Reflaction and Serialization mechanism in .NET; resolves the semantic conflict, which comes from the conversion between the public pattern and the local pattern,by using Semantic- Adapter Agent,compresses the Geo-Data by using Geo-Data Compress Agent. 6,It designs the function of the client,and realizes the integration of Base Geo Information, Civil Defense Theme Information, Correlative Specialty Layer, which proves the theory and method of Geo-Data Integration brought forward in this paper.