Research And Development Of Agricultural Economy Information Service System Based On Component GIS

With the primary purpose of constructing an agricultural economic information service system and on the basis of consulting a large number of domestic and foreign books and papers related, the research proposes a designing plan that uses Component GIS technology in agricultural economic information service, integrates agricultural economic information data with administrative divisions electronic map, utilizes geography information system to manage spatial information and attribute information, fulfills visual and dynamic queries and analysis according to agricultural economic information's geographical distribution, and implements regional agricultural products analysis based on comparative advantage model. This thesis also studies on the comprehensive utilization and deep mining of agricultural economic information. Major work is as follows:Using Supermap Objects, a home-made component GIS software, as the development platform, C#.Net as the language environment, adopting object-oriented technology and component-based development technology, I design and develop an agricultural economic information services GIS system, realizing such functions as the interactive visual queries between spatial information and economical data, the dynamic generation of every province's agricultural basic status and statistical charts, and so on.Using agricultural economic information both on provincial and county level from China's Ministry of Agriculture rural economy basic information database, and an 1:4 000 000 scaled electronic map of China's National Bureau of Statistics as data source, build agricultural economic information spatial information databases and attribute information databases.Using a comprehensive analysis method integrating scale advantage exponents with efficient advantage exponents, county-level administrative divisions as regional boundary, build a comprehensive comparative advantage model, and integrate it with the system, fulfilling comparative advantages'calculation and analysis of regional agricultural products.Adopting functions of Supermap Objects and TeeChart components, dynamically generate thematic maps and statistical charts, implement statistical analysis and spatial thematic analysis of agricultural economic information, clearly reflecting the comprehensive utilization of agricultural economic information data.Vividly and clearly exhibiting distribution conditions of agricultural economical regions, agriculture advantages industrial belts and country's farmer's market on maps, provide decision support tools and supporting analysis basis for agricultural policy-making departments at all levels, scientific research entities, and agricultural production sectors.This paper elaborates on the system's technical foundation, architecture, function modules and the basic processes of using component GIS for second development. This paper concludes on the research of agricultural economic information service GIS system and on the involved works of developing. This paper also analyses the system's practical value, further studies on it and simply discusses PDA and GPS based agricultural economic information service.