Research On The Spatial And Temporal Data Organization Model Of Ocean Flow Field Based On Ontology

With the continuous development of ocean stereoscopic detection technology,people have acquired and accumulated abundant spatiotemporal data information of ocean flow field.The study of spatial and temporal data organization model is one of the important research topics of Marine GIS.It is of great significance to realize the spatial and temporal data organization of ocean flow field with a unified semantic framework,and to analyze the semantic information sharing and migration law of ocean flow field based on heterogeneous ocean data.In this paper,the research progress of ocean spatiotemporal data organization is analyzed.Aiming at the semantic heterogeneity of ocean flow field,the spatiotemporal semantic analysis,semantic modeling and expression of ocean flow field are carried out based on ontology and the spatiotemporal process of ocean flow field phenomenon.Firstly,the concept of spatiotemporal object of ocean flow field is studied,and the conceptual semantic relation of ocean flow phenomenon is summarized.Flow field in the study of time and space process instances from the sea,summarized the basic characteristics of the current field in time and space process at sea,Marine flow field in time and space process has strong continuity,certain periodicity,strong affinity and common characteristics:space-time multiscale,based on the topology theory and the ontology thought,to the Marine flow field were analyzed,and the relationship between time and space process object flow field in time and space process of the oceans and simple process and complex process definition,based on the five yuan group of Marine simple flow field in time and space process ontology structure and quad Marine complex flow field in the form of time and space process ontology structure,The complex form between complex process and simple process is studied to realize the organization of spatiotemporal process data of ocean flow field.Finally,OWL_DL ontology description language is applied to realize the formal expression of spatiotemporal semantics of ocean flow field in Protege,an ontology modeling tool.Based on the ontology-based spatiotemporal semantic modeling method of ocean flow field,this paper establishes a systematic and structured spatiotemporal process ontology of ocean flow field,realizes the formal expression of concepts,attributes and relationships of spatiotemporal objects of ocean flow field,and makes it possible to share spatiotemporal data of ocean flow field.The powerful knowledge analysis ability of ontology and the efficient semantic expression ability of OWL provide strong theoretical and technical support for the expression of knowledge concept of ocean flow field.The established spatial-temporal semantic description system and ontology structure model of ocean flow field show that the ontology-based spatial-temporal data organization method can effectively describe and organize the spatial-temporal semantic information of ocean flow field,which provides a reference for the study of Marine spatial-temporal semantic expression and the sharing and interoperation of potential spatial-temporal information mining.