Research and Application of 3D Virtual City Based on Unity3D

In order to improve the 3D virtual city system deficiency of high fidelity,strong interaction and high precision etc,proposed the realization method of 3D virtual city based on the Unity3D platform.First,the three-dimensional terrain data should be collected and established,besides,built and imported the three-dimensional model.On this basis,combined with the Unity3D platform of 3D engine,realize integration of the 3D model data and 2D spatial data,the 3D virtual wandering and the effect of three-dimensional physical simulation etc.Finally,the system used real data to test,proved that the 3D virtual technology achieves each indicator of 3D virtual city system well,and has completion of high efficiency.