A 3D data model for large-scale virtual urban under network environment

作者：He Zhengwei^*

来源：International Review on Computers and Software, 2012, 7(2): 749-753.

• 3D models
• Building model
• Component elements
• Encoding methods
• Experiment system
• Network circumstances
• Network environments
• Network services
• Network transmission
• Organization and management
• Quadtree structure
• Real-time networks
• Spatial data
• Spatial data model
• Spatial indices
• Spatial resolution
• Three-dimension
• Urban buildings
• Urban model

The three-dimension (3D) data of virtual urban buildings are complex and diverse, and its quantity is massive. Those bring very big challenge for the management and service of 3D urban model data under network circumstance. Existing spatial data model is not suitable for large-scale 3D model data management and service on network. On the basis of analyzing the characteristic of network service about massive 3D urban model data, this paper focuses on the organization and management of spatial data and the network services strategy, and proposes a progressive network transmission schema based on the spatial resolution and the component elements of 3D building model data. Next, this paper puts forward multistage-link three-dimensional spatial data model and encoding method of spatial index based on fully level quad-tree structure. Then, an experiment system is developed using proposed theory. Experimental results have shown that the proposed 3D spatial data model can availably manage large-scale 3D urban model data and provide the network services real-timely.

• 出版日期2012