The Research On Model Of Vector Graphic Of ComGIS Based On Spatial Database

Spatial database has become the main aspect of the technology to geological data processing and management,especially to massive data。After the database of the Oracle,PostGIS,MySQL support the spatial data type,SQL Server,occupied the most market share,also issues the technology to support the spatial data type。SQL Server Spatial is a new database product integrated with the.NET Framework,and it is a new solution to build the spatial database application。This paper was established on SQL Server Spatial,and it was with the purpose of a realization of vector data management platform based on.NET COM technology。First of all,it emphatically studied the data storage,query,spatial indexing and the methods of spatial data manipulation;Secondly,based on.NET Framework, Microsoft SQL Server Types Library and GDI/GDI+ API,it studied the geometry data access and visualization technology;Finally,according to the idea of COM component,it designed a ComGIS architecture on the basis of a set of.NET assemblies。Utilizing the assemblies,it developed a simple common GIS which included the function of data management,database table and relation creating,spatial query and GIS interactive manipulation,and it validated the library architecture is opening as well as flexible to secondary developement。Through these studies to learn about the SQL Server Spatial vector model of the OGC's the degree of implementation and expansion of the way for the future of GIS application based the SQL Server Spatial to provide some reference.The GIS assemblies realized in this paper including technologies of spatial data access,visualization and analysis that is different from the traditional method of implementation of the COM,and provides new ideas for GIS application oriented spatial database on managed environment。...