The visual analysis of surface cracks plays an essential role in tunnel maintenance when assessing the condition of a tunnel. To identify patterns of cracks, which endanger the structural integrity of its concrete surface, analysts need an integrated solution for visual analysis of geometric and multivariate data to decide if issuing a repair project is necessary. The primary contribution of this work is a design study, supporting tunnel crack analysis by tightly integrating geometric and attribute views to allow users a holistic visual analysis of geometric representations and multivariate attributes. Our secondary contribution is Visual Analytics and Rendering, a methodological approach which addresses challenges and recurring design questions in integrated systems. We evaluated the tunnel crack analysis solution in informal feedback sessions with experts from tunnel maintenance and surveying. We substantiated the derived methodology by providing guidelines and linking it to examples from the literature.

中文翻译：

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隧道裂缝分析的可视化分析和渲染

在评估隧道状况时，表面裂缝的视觉分析在隧道维护中起着至关重要的作用。为了识别危及混凝土表面结构完整性的裂缝模式，分析人员需要一个用于几何和多元数据的可视化分析的集成解决方案，以确定是否需要发布修复项目。这项工作的主要贡献是设计研究，通过紧密集成几何和属性视图来支持隧道裂缝分析，使用户能够对几何表示和多变量属性进行整体可视化分析。我们的次要贡献是可视化分析和渲染，这是一种解决集成系统中的挑战和反复出现的设计问题的方法论方法。我们在与隧道维护和测量专家的非正式反馈会议中评估了隧道裂缝分析解决方案。我们通过提供指导方针并将其与文献中的例子联系起来，证实了派生的方法论。