Multi-scale Representation Of 3D Route Scene Based On Dynamic Segmentation

With the development of science and technology,3D visualization has been widely used.Among them,3D line scene has the characteristics of zonal distribution,complex structure,high relative accuracy,stronger current situation and strong pertinence.The existing spatial data organization methods can not fully meet the application requirements because they do not consider the characteristics of linear scene.At the same time,they lack of targeted 3D and temporal support,so it is difficult to refine the one-dimensional relative position relationship between data in 3D scene It's true.Therefore,the design of an efficient data organization and dynamic expression method for 3D line scene needs further research.To solve the above problems,this paper proposes a multi-scale representation method of3 D line scene based on dynamic segmentation,and realizes the data organization and dynamic representation of 3D line scene.Firstly,based on the mainstream pyramid model,dynamic segmentation and other related research,combined with the characteristics of linear scene data,the dynamic segmentation technology is expanded,the mosaic pyramid model is established,and the linear reference data organization model oriented to multi-scale expression is constructed by applying the scale up algorithm.Secondly,an event driven model is built to simulate the 3D line dynamic scene by injecting attribute events,space events and business events.Finally,the high-speed railway emergency dispatching command system is designed,which proves the feasibility of the method.The main research contents and achievements are summarized as follows:(1)A multi-scale spatial data organization method for 3D line scene is designed.By extending the dynamic segmentation technology vertically,adding the vertical structured pyramid model,and combining with the scale up algorithm,a linear reference data organization method for multi-scale expression is proposed,which realizes the non spatial data spatialization of multi-source heterogeneous data in 3D line scene,which is conducive to the efficient data organization and management,and provides a dynamic table for 3D line scene data We need to provide support.(2)A linear scene dynamic expression method based on event driven is designed.This method is based on the linear reference data organization model,combines with the characteristics of line scene,classifies and manages the events,and triggers the event driven model to affect the data types in different time states.Finally,the whole dynamic scene is simulated to realize dynamic evolution.With the support of version management,the model can effectively solve the problem of different time granularity in the process.(3)Through the research and development of Shanghai Kunming high-speed railway emergency dispatching command system,it is verified that the multi-scale expression method of 3D line scene based on dynamic segmentation can support the rapid construction and dynamic expression of 3D line scene.