Research on Real-Time Visualization of Massive Data Oriented to Digital Earth

Recently, the digital earth has developed from the laboratory to the society. With the increase of the data volume, the software is required to provide more functions. The organization and management of massive data is the key for the real-visualization, which determine the software function. The techniques of real-time visualization of massive data oriented digital earth are explored, including data organization and realtime rendering. In this paper, the massive data is organized as multi-solution tile-pyramid model which combine the algorithm of LOD and linear quarter-tree index. Then, the management of massive data for dynamic scene of 3D visualization with large area is discussed, which use the target-tile quick search algorithm and data prefetching strategy. At last, an example is used to prove that this method can realize the real-time visualization and interoperation of massive topography data and improve the function of digital earth software.