In the application of GIS, there is a need to manage spatial data. For this purpose spatial database systems are designed to be full-fledged database systems with additional capabilities for storing, retrieving, manipulating, and querying spatial data. But there are many difficulties to manage spatial data using spatial databases, such as numerical robustness and topological correctness. To solve these problems, we introduce some new concepts about Regularly Spatial Discrete Domains (RSDD), RSDD-based Primary Object (RPO), RSDD-based Object (RO), and defined the spatial data types and their operations over RSDD. As in a computer system, it is feasible only with limited precision, i.e., over a finite, discrete, and homogeneous grid, this strategy is ad hoc suitable for correct finite-precision implementations of geometric algorithms.