| With the new adjustment of agricultural industrial structure and the entry of China into WTO, many chances, "traps" and all kinds of challenges are confronted with vegetable industry at the same time, which make it more and more urgent to obtain and handle all kinds of vegetable information in a comprehensive, timely, accurate and objective manner. But all these problems can not be solved in current national vegetable information system. In the light of these problems, an assumption on establishing an assistant decision information system based on WebGIS for provincial vegetable production and management is put forward in this thesis.Under the guidance of software engineering ideas, taking Jiangsu Province as an example, the system is designed by GIS technology, network technology, database technology and together with knowledge of vegetable science, theory of agricultural district planning and layout, and assessment model of non-pollution vegetable production base and so on. This system is composed of basic geography information subsystem, district regional planning subsystem, assessment subsystem, query subsystem, statistic subsystem, help subsystem and maintenance subsystem. Because of the introduction of WebGIS technology into it, vegetable district planning and layout of the eleven types of vegetables in Jiangsu Province can be optimized with its advantage of handling mass data and great spatial analysis capability.The function in the assessment subsystem is performed about how to evaluate non-pollution vegetable bases in the study. The assessment results of non-pollution vegetable bases are shown in visualization and issued on network by Dreamweaver MX, HTML, JavaScript,Java, GeoBeans and SQL Server 2000, combined with the assessment model of non-pollution vegetable base. So, every user can browse these results at anyplace connecting the Internet. This will be very useful for the government and the leading enterprise to make quick and exact decisions. |
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