Ontology Constructing And Object-oriented Spatial Database Designing In The Flood Risk Analysis Area

China is among the world’s most natural disaster prone areas, and Flood is the mostserious in all kinds of disasters. At present, both many experts and local departments(such as: Meteorological departments, Water sector and the Flood Control and DroughtRelief quarters) have done a lot of research about flood to develop a series of informationsystems, all such effort is starting to work. However, these work are carried outindependently and differently, the results is difficult to share and reuse because ofheterogeneity between them.As a semantic model, Ontology’s advantages have been noticed in knowledgerepresentation, sharing and reuse because it can accurately describe the concept and therelationship between the concept. The domain ontology in biology, medicine, digitallibraries and other has generated positive results now. In general, ontology can be used tobe beneficial to communication between people, helpful to the interaction of the systemand good for systems engineering.In this paper, we build the domain ontology in the Flood-Risk analysis area using amethod based on formal concept analysis. After introducing the basic theoreticalknowledge about Flood-Risk analysis, traditional ontology building methods, the formalconcept analysis and so on, we summed up a suitable means for constructing ontology inFlood-Risk analysis area. At last, with the method as guidance, Domain ontology is builtusing the Protégéand ConExp tools.Finally, we design the spatial database conceptual model based o n Geodatabase withthe help of the Domain ontology. In the process, it verified the function by reducing thedifficulties of communication between people, provid ing domain knowledge andspecification for designers in database design.