The Research And Implementation Of Agriculture Geographic Information System Based On COM Technology

GIS(Geographic Information System) is a kind of system which mainly input, output, query, manage and analyze geographic data with powerful spatial analysis functions and become an efficient tool of environment protected, traffic, soil resource management ,layout, post, electric power, military affairs and geology.The development of application GIS mainly has three formats. The first is self-determination, the second is introduced into software of overseas advanced geography information system, then according to personally needs carry through secondary exploitation, the third is utilize high class programmed language supported oriented-object technology and the control provided by the GIS manufacture to make up of user's eventual application software, that is component idea.Digital agriculture is a currently developing trend of the agriculture information building. First, after analyzed the agriculture developed trend of GIS and detailed the current popular situation of GIS software inside and outside the civil, this paper put forward the frame design of agriculture district information system based on GIS. The design includes database structure and performance design and the system performance design.Second, based on this analysis and to verify the realizable of the design of the system, according to the data of Fu Shun City agriculture resource investigation, the information system of agriculture based on GIS was realized. In the process of database developed, the function analysis of the system was particularly processed; the data flow course was managed and designed the function models of the database system. The "Data" database was built and the relative models were established such as data edit, data query, data statistic and data report.Third, the function of showing, zooming in, zooming out, wandering of map and drawing kinds of chart is realized in the system. The thesis researches the arithmetic of Dijkstra deeply, and then enriched the spatial analysis functions of MapX. According to the units of villages, system provides a particular defends of BirdFlu. Making simulate analyze to the village according to users' request at any moment, showing state of this analyze. And also, this is the difficulty and innovation of this thesis.The thesis has some practical application meaning , because it is less of the application of GIS in agriculture information. Through the studies on establishment and application of agriculture resource management information database based on the desktop firstly, this paper established a stability basis for the agriculture department to improve work efficiency, realized the information management and digitalizing agriculture.