Organization Multi-scale 3d Model Data to Meet Network Transmission

Existing research mainly fucus on organization and visualization of 3D building models in circumstances which are the main spatial objects, yet multi-scale representation of geometry and texture information still not taken into account, especially multi-scale transmission suitable for the network environment is a key point needed to be break. Thus, an organization method for multi-scale 3D model data to meet network transmission is proposed in the paper: (1) A multi-scale 3D model data structure based on the spatial point index is constructed, and which is integrated with multi-scale textures representation. (2) A method of 3D model data multi-scale partitioning orgnazation based on hierarchical quadtree structure is applied to adapt to multi-scale scheduling and transmission of 3D model data. And a prototype system is developed on GeoGlobe software. The experiment result shows that according to the movement of view point in the 3D scene, our approach can dynamic transmit the multi-scale, partitioned tiles of 3D model data to effectively reduce the data quantity of transmission and improve the performance of scene rendering.