Study on the real time navigation data model for dynamic navigation

Dynamic navigation is the advanced level of navigation service. The construction for an efficient and effective navigation data model to meet the requirements of dynamic navigation is the key point of the study. It first introduces the system requirements of dynamic navigation for navigation data. Then it briefly discusses several current navigation data models, such as KIWI, SDAL and ISO-GDF. The study found that current navigation data models have limits in their design for dynamic navigation and more work should be done in the research of real time navigation data models. In the paper, it discusses the content of real time navigation data and gets that the content mainly contains data of traffic events and data of traffic flow. Both of them are different feature classes of real-time navigation data based on ISO-GDF model. The descriptions of them include definition, properties and relations. In the model construction, the relations among events, the executants of events and target statuses are given consideration. The model which is got by the study can be used with a certain physical data models in dynamic navigation applications.