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中文摘要：
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。
英文摘要：
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.
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