摘要
现有的LOD技术确保了3维地表的实时绘制,但其不能解决以地理实体为结构进行组织、具有实体表达能力的高精度、大规模地形TIN的3维可视化实时响应问题,仍经常发生场景滞涩、跳跃等现象。为此,本文从面向对象的角度出发,对地形TIN按实体进行组织,建立了OTIN,设计出实体包围球、高程误差队列等结构,可以确保以实体为单位的大规模地形TIN的实时绘制。
Existing level of detail technologies offer a good support for 3 D real-time rendering, but it can＇ t accomplish real-time responding of 3D visualization in extensive terrain TIN that is constructed with geographic objects. Scene block and view discontinuousness often appear. According to the object orientation-based view, this paper constructs geographic objects, designs the enclosing ball, and devises the error queue of geographic objects in object triangulated Irregular network. Those methods can assure the real-time rendering of 3D visualization in large scale TIN that is constructed in entities.
出处
《测绘科学》
CSCD
北大核心
2009年第4期53-54,26,共3页
Science of Surveying and Mapping
基金
国家自然基金"GIS多源集成空间数据间不一致性的智能化处理理论与方法"(编号40501053)
关键词
层次细节技术
地理实体
对象化不规则三角网
三维可视化
level of detail
geographic objects
object triangulated irregular networks
3D visualization
作者简介
王殷行（1972-），男，山东烟台人，博士，主要研究方向：地形三维可视化，虚拟现实。E—mail：wyxhml@163．com
