The development of an open system is important to allow for future expansion of capabilities because of the proliferation of spatial data, systems and applications. In this paper, the system architecture provides a distributed, interoperable and scalable environment. It is intended to unify the multiplicity of approaches and technologies to spatial information system. The spatial model, focusing on the scalable representation, shared data space and effective verification, is a useful method for better simulation, visualization and analysis over space and time. Furthermore, the system offers services based on components or subsystems to facilitate the creation and extension of applications and information communities.