2 A Structured Methodology for Interoperable Geographic Applications : The Case of the

The research reported in this paper uses as a test case an on-going project: the design and development of the cadastral system in Greece. The main focus is on the database design, specifically at the stages of conceptual and logical modeling. Issues such as modeling the intricate nature of space, as well as the need to exchange not only data formats but, also semantics captured by computer systems are faced. At the conceptual level we represent the ontologies of the application and their semantics, while at the logical level we provide the language to exchange them. Finally, commercial tools as well as models resulted from theoretical research are combined and tested for their applicability.