The Integrating Of Environment GIS Based On The Metadata

The database of environment geographical information system managemagnanimity, complicated environmental most effective means of datum one ofespecially. With the fast development of the technology of the database and application,and people's improvement to that geographical whole operational efficiency ofinformation system and geographical information sharing required, need to carry onsystem integration on the basis of different data resources. Metadata compatibility strong to store form, being little, data have high sharingvery, it is convenient to manage , is playing an important role in system integration anddata are integrated. This paper combines 973 projects " the soil and urban air quality inthe areas of the Changjiang River , Zhujiang River Delta change the law and regulationand control principle ", is it on the basis of Metadata of integrated research of datum ,set up data collection system to go on among Environment GIS. The environment geographic information system is the important branch of thegeographic information system . In the comprehensive analysis system integrationtechnology and in the information sharing technology foundation, Revolved theMetadata and the data integration,this article research several following problem:1. Thorough analysis system integration technology, analysis and the frame, the article mainly research on the spatial data and the attribute data integration .2. Base on the 973 projects present need of information sharing , this article used the Metadata in the system integration., research the data integration based on the Metadata .3. Base on the Completely analysis of the project's environment quality information of the classification, The article Descript the logical relations between the environment quality information and the classification . This article mainlyDescript the demand analysis, the system analysis and the system design stage situation4. Uses the Delphi integrated development environment and the MapObjets carries on the system development. Last, this article demonstration system movement situation, analysis system movement result.