The Study Of Seicomgis And Achieve Its Land Systems Applications

Land Information System (LIS) is derived from Geographic Information System (GIS). It is the management of land information , using Geographic Information, remote sensing, database , network and other computer advanced techniques. It includes database of land information, land ownership, nature property , economic property and methods of collection, description, procession and distribution of the data. It is the management and development auxiliary tools of law, excution and economic principle.With the wide application, traditional GIS of today can't satisfied the need of practical application. GIS based on Component Object Model (COM) is the GIS of the new generation. It conforms to the trend of the development of modern software project and software developing technique.COM technology has become the standard in the computer field , consumer can use COMGIS components as the other ActiveX components . Users without special knowledge of GIS can develop GIS. This promote the popularity of GIS.The thesis first describes the concepts and composition of COMGIS, the relationship between the digital earth and land information system, the trends of GIS to COMGIS, introduces the concepts and advantages of component and COMGIS technology, discusses the composing of COMGIS platform and the problems that should be paid attention to in the procedure of componentization and analyses the model of COMGIS. Based on the above research, the thesis develops the system design the whole structure and the components of a COMGIS- SeiComGIS, especially discussing its space-attribute interaction enquiry and proposing the actual solution of spatial query. The main and basic components of the system performance function are as the following : data management component , data query component, layout and print component, map controlling component, outline management component and so on. The thesis also introduces its application in the "Jinzhou Land Source Bureau Management System ". At the end of the paper, the author summarizes the study of the COMGIS' construction and the prospect of next step.