| 地形TIN中地理实体表达与LOD技术 |
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| 引用本文： | 王殷行.地形TIN中地理实体表达与LOD技术[J].测绘科学,2009,34(4). |
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| 作者姓名： | 王殷行 |
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| 作者单位： | 山东理工大学建筑工程学院,山东淄博,255049 |
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| 基金项目： | 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) |
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| 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。
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| 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 |
A representation and LOD technology for geographic objects in terrain TIN |
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| WANG Yin-xing.A representation and LOD technology for geographic objects in terrain TIN[J].Science of Surveying and Mapping,2009,34(4). |
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| Authors: | WANG Yin-xing |
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| Institution: | Institute of Architecture & Civil Engineering;Shandong university of technology;Zibo 255049;China |
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| Abstract: | Existing level of detail technologies offer a good support for 3D 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-... |
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| Keywords: | level of detail geographic objects object triangulated irregular networks 3D visualization |
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