Development and applications of spatial-temporal database based on China cropland resources and remote sensing

Traditional database storage based on file mode is difficult to resolve problems such as data sharing, network communication, concurrency control and recovery mechanism of data security, meanwhile, the research on dynamic monitoring, evaluation and prediction of China cropland resources is becoming widely concerned. Referring to the system structure of SQL Server 2000, adopting the SDE administrator command method with ArcSDE data engine interface, and using component object model library of ArcGIS Engine 9.2, we realize seamless integration of the spatial data warehousing and complete client-side GIS development and applications in Microsoft VB 6.0 circumstance. As a result, spatial-temporal database based on China cropland resources and remote sensing is built with C/S operated mode which can reach the top TPC-C performance. In conclusion, the database system achieves four major functions: First, it realizes map searching, spatial analysis and result displaying by using spatial database. Second, it achieves information searching, statistical analysis and data tabulation by using attribute database. Third, it carries out database updating in time with real-time remote sensing database. Fourth, it makes productive potential estimating become true by using algorithmic models.