The Study On Maintenance And Sharing Of Entironment Information Data's Based On GIS

Nowaday, Information has become a sort of important strategic resource, whereas information sharing is an important sign of society's civilization and advancement, and an important factor of driving society advanced and ensuring society's economy lasting and steady development. Circumstance Information Data, as a sort of basic data relate nation's stratagem policy, is necessarily at builded nation economy and have an important function. How to maintenance circumstance Information Data and how to achieve the society sharing of circumstance Information Data is not only advance circumstance Information Data's utilize efficiency, but also advance whole socity's consciousness of circumstance protecting and promote society's civilization and continuable development. Comparing with commonly information,circumstance information data sharing's difficulty consist in cognizance of the Circumstance information data sharing's content, the criterion of the basic circumstance information data and the implement of circumstance information which based on the Internet technology. On account of circumstance information data's complex content, .huge information and interleaving in time and space, it should be maintenanced and administed in time, integrality, veracity and security.Based on the difficulties of the data sharing and the feature of the information data, somemethods of data sharing and maintenance are advanced, furthermore, as the 973 item——Soiland Air Environmental quality changing rule and controlling principles in Changjiang and Zhujiang delta, The example of the circumstance information database's design in Changjiang and Zhujiang Delta, the correlative study was developed on maintenance of Circumstance Information Database and data's Web-transmission.(1) Maintenance of Circumstance Information Database in Changjiang and Zhujiang delta: From every items' data establish, resume and backup and data structure modify and its note adding, deleteing and moditied Circumstance Information Database in Changjiang and Zhujiang delta be managed and maintenanced and to ensure data's veracity,integrality and security.(2) Sharing of Circumstance Information Database in Changjiang and Zhujiang delta: The study was carried out adopted C/S structure from delta data sharing's basic model and method, total item's circumstance data be storaged in the Server, every item-group can query and display them and send and download the data from the Server, thus Circumstance Information Data in Changjiang and Zhujiang can be well used and enter the database timely.The system uses Geodatabase namely the third standard data structure of ESRI. All kinds of space datas and data structure are foundated, transformed and inpoured by ArcCatalog; to achieve space datas's editor by ArcMap; Attribute datas Storage in SQL DataBase which were found by each item-group. Using Delphi 7.0 as empolder flat roof, and appendding ArcGIS Engine of GIS subassembly to complete the openness system data's administer, maintenance and sharing.