Research And Application On Event-Based Object-Oriented Data Model

It has become an important research direction to develop spatio-temporal modeling technology, to get the whole description information about the space, time and attributes of the geographic phenomenon, to realize the storage, management and utilization of spatio-temporal data, to complete the analysis of time series, space and spatio-temporal relationship. The author provides the concept model, logic model and physical model of spatio-temporal information modeling from the perspective of geographical cognition and event semantics, makes systemic study on expression, the record and the utilization of spatio-temporal information and spatio-temporal relationship, the main contents of the study are described as follows:The author analyzes space and time these two basic existence form of substance, studies space, time and attribute these three basic characters of geographic entity, provides the idea to divide time semantics into event semantics, to build spatio-temporal model based on event semantics. The author analyzes every aspects relating with event, such as object status change, space location change, object attributes change and object change etc, provides spatio-temporal, description way using five-domain, and gives detail description about each component of it.The author summarizes the two former ways to express spatio-temporal information, namely the way to express spatio-temporal information with way and the way to express with event and procedure, gets the pith of these two ways, provides the logical model based on event semantics, and defines the model with UML.DaLian Plan and Construction on Village and Town Management System is taken as example in the paper.The spatio-temporal model is build using the principle described above, time table, space table, event table, attribute table and relationship table are set up here, the program about query on time, location, attribute ,event and trace about one entity or entire area are provided. Finally DaLian Plan and Construction on Village and Town Management System are provided in paper.