Connecting with the features and practical application demands of current urban spatial information, this paper emphatically expounds the road network model and path planning technology, and points out that the urban navigation system carries out the processing and application of urban spatial information by using computer digital technology and method.

Being the basic of the intelligent transportation system, the road network model becomes the focus of the research.

Study on road network model based on virtual node joint

After reviewing the up-to-date road network models and analyzing the critical limitations,the next generation model is proposed,which is characterized by ① the real lanes are considered as the basic modelling primitive;② the 3D lane-to-lane topology is generated;and ③ comprehensive analysis and realistic visualization are available.

In order to reduce computational burden, this paper develops a new algorithm based on stored data from the road network model of hierarchical and spatial decomposition.

Study and realization of road model based on traffic management GIS;

Research of the seamless fusion algorithm between road model and terrain model based on TIN

Research purposes: This paper researched the design concept of 3D Models in Virtual Reality based on photogrammetry and detailed design method of 3D house models,road models in order to reach the visual effect of high-fidelity of 3D models when reconstructed and displayed.