论文部分内容阅读
自适应可视化大规模复杂的空间数据已成为三维地理信息系统(3DGIS)的研究热点.为了从服务器传输可视化信息到客户端,文中提出了结点——层数据模型来组织三维场景,该三维场景提供了有效的数据管理方式,包括空间索引和渐进传输算法.服务器根据顶点和三角形数目,对场景元素不是提供几个预先计算的细节层次,而是连续分辨率的表达.客户端根据硬件的性能对复杂三维场景自适应多分辨率可视化,满足多用户并发访问的要求.实验证明,文中的方法能有效地解决大规模复杂空间数据模型的快速可视化.
Adaptive visualization Large-scale and complex spatial data has become a research hotspot in 3DGIS.In order to transfer visual information from the server to the client, a node-layer data model is proposed to organize 3D scene, which provides Effective data management methods, including spatial indexing and progressive transmission algorithm.Server based on the number of vertices and triangles, the scene element is not to provide several pre-calculated level of detail, but the expression of continuous resolution.According to the client’s hardware performance pairs The multi-resolution visualization of complex three-dimensional scene is adaptive to multi-user concurrent access.Experiments show that the method in this paper can effectively solve the problem of rapid visualization of large-scale complex spatial data model.