Geometric modeling of geospatial data for visualization-assisted excavation
Geometric modeling of geospatial data for visualization-assisted excavation
复制标题
用于可视化辅助挖掘的地理空间数据的几何建模
DOI：
10.1016/j.aei.2013.01.004
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Hubo Cai
中科院分区：
文献类型：
--
作者：
Sanat Talmaki;V. Kamat;Hubo Cai
地下公用事业线路在施工或维护作业中被机械化挖掘机撞到是一个长期存在的问题。除了公共服务、日常生活和商业中断外，公用事业罢工事故还会导致人员伤亡和财产损失，造成重大经济损失。挖掘造成的公用事业打击主要是因为缺乏有效的方法来协同地理空间公用事业地点和将挖掘设备移动到挖掘机操作员可以访问的实时三维(3D)空间环境中。实现这种基于知识的挖掘方法的一个关键方面是地理空间效用数据及其几何建模。不准确和/或不完整的公用设施位置信息可能导致错误地灌输信心，并对挖掘机操作员产生反作用。本文讨论了地理空间效用数据的几何建模的计算细节，用于三维可视化和邻近监测，以支持基于知识的挖掘。描述了地下公用设施地理空间数据生命周期的各个阶段的细节，并分析了妨碍数据在诸如开挖指导等下游工程应用中有效使用的固有限制。五个关键要求--互动性、信息丰富性、三维性、精确度表征和可扩展性--被确定为在对位置敏感的工程应用中使用地理空间实用数据所必需的。本文开发并提出了一个符合上述要求的可视化框架--IDEA，用于在三维仿真环境中实时几何地表示埋藏的公用事业地理空间数据和挖掘设备的运动。
Underground utility lines being struck by mechanized excavators during construction or maintenance operations is a long standing problem. Besides the disruptions to public services, daily life, and commerce, utility strike accidents lead to injuries, fatalities, and property damages that cause significant financial loss. Utility strikes by excavation occur mainly because of the lack of an effective approach to synergize the geospatial utility locations and the movement of excavation equipment into a real-time, three-dimensional (3D) spatial context that is accessible to excavator operators. A critical aspect of enabling such a knowledge-based excavation approach is the geospatial utility data and its geometric modeling. Inaccurate and/or incomplete utility location information could lead to false instilled confidence and be counterproductive to the excavator operator. This paper addresses the computational details in geometric modeling of geospatial utility data for 3D visualization and proximity monitoring to support knowledge-based excavation. The details of the various stages in the life-cycle of underground utility geospatial data are described, and the inherent limitations that preclude the effective use of the data in downstream engineering applications such as excavation guidance are analyzed. Five key requirements - Interactivity, Information Richness, 3-Dimensionality, Accuracy Characterization, and Extensibility – are identified as necessary for the consumption of geospatial utility data in location-sensitive engineering applications. A visualization framework named IDEAL that meets the outlined requirements is developed and presented in this paper to geometrically represent buried utility geospatial data and the movement of excavation equipment in a 3D emulated environment in real-time.