基于3DGIS数字化城市海量模型数据调度策略研究

Mass Model Data Scheduling Strategy of Digital City Based on 3DGIS

针对海量数据实现动态可视化的瓶颈,提出了一种海量模型数据调度策略算法。在开发3DGIS数字城市系统过程中,提出了基于四叉树场景管理、模型分块、多级细节层次(LOD)的分页数据库的调度策略算法,实现了海量精细化数字城市模型数据库组织与管理的高效性、以及海量数据场景调度的实时性。用提出的海量模型数据调度策略算法应用于运城市3DGIS数字城市系统进行了检测,实验表明,海量模型数据调度策略达到了预期效果,系统浏览交互实时、高效,城市模型视觉逼真、精细,性能提升明显。

This paper studies mass model data scheduling strategy of digital city based 3DGIS according to the issue of dynamic visualization of mass model data.In order to realize the efficient database organization and management and mass data scenes realtime scheduling,it proposes the page database scheduling strategy Based on quadtree scene management,model block, multi-stage levels of detail(LOD).Finally, it verifies that the scheduling strategy has achieved the desired results taking 3DGIS digital city system development of Yuncheng as an example.The system has realized the real-time and efficient interaction and realistic and fine city model view.