Spatial Data Objects Based On Relational Database

This paper gives an introduction of the development background and general design of the spatial data object (SDO), which is developed by using COM technique and based on standard RDBMS but independent on DBMS products, and the management scheme of the spatial data in the RDI3MS ,also lays particular attention on the technique on spatial data indexing and twice filter query of spatial data. The research on this product may help for the co-developing of GIS application system and the unique management of spatial data.