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首页> 外文期刊>ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences >3D VIEWPOINT OPTIMIZATION OF TOPOLOGICAL RELATIONSHIPS: APPLICATION TO 3D CADASTRE FOR VISUAL EASEMENT VALIDATION
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3D VIEWPOINT OPTIMIZATION OF TOPOLOGICAL RELATIONSHIPS: APPLICATION TO 3D CADASTRE FOR VISUAL EASEMENT VALIDATION

机译：3D视点优化拓扑关系：3D Cadastre应用于视觉地位验证的应用

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Offering optimum 3D viewpoint to user can be attractive in relieving occlusion in 3D scene. This could be much relevant for the visualization of 3D cadastral systems since they constitute complex datasets including both physical and legal objects while users are operating a number of visual tasks that require precise outlook. However, 3D viewpoint usability has yet to be evaluated to demonstrate its relevance in accomplishing given end user’s visual tasks. Hence, in this research project, the focus is set on visual identification of 3D topological relationships (disjoint and overlap) as it is one of the main users’ requirements in 3D cadastre. To this end, this paper addresses this issue using a virtual 3D model of the Planetarium Rio Tinto Alcan (Montreal city) in which property issues take place, especially regarding the easement validation procedure. Empirical tests have then been administrated in the form of interviews using an online questionnaire with university students who will specifically address such issues in their professional career. The results show that a 3D viewpoint that maximizes 3D disjoined or overlapped geometric objects’ view area within the viewport significantly outperforms traditional combined software points of view in visually identifying 3D topological relationship. This paper also suggests that user’s inexperience in 3D cadastre reduces visual task efficiency when visually identifying 3D topological relationship among overlapped geometric objects. Eventually, this study opens up new perspectives on 3D topological relationships modeling and visualization.
机译：为用户提供最佳的3D观点可以吸引3D场景中的闭塞。这对于3D地籍系统的可视化来说，这可能是非常相关的，因为它们构成了包括物理和法律对象的复杂数据集，而用户正在操作需要精确前景的许多视觉任务。但是，尚未评估了3D视点可用性以展示其在完成最终用户的视觉任务方面的相关性。因此，在本研究项目中，重点是在3D拓扑关系（不相交和重叠）的视觉识别上，因为它是3D Cadastre中的主要用户需求之一。为此，本文使用Planetarium Rio Tinto Alcan（Montreal City）的虚拟3D模型来解决此问题，其中属性问题发生，特别是关于地换验证程序。然后，经验证明测试以采访的形式通过与大学学生一起专门解决其职业生涯中此类问题的大学生。结果表明，在视觉中最大化3D Disjoined或重叠的几何对象的视图区域的3D观点显着优于视觉识别3D拓扑关系中的传统组合软件观点。本文还表明，当在视觉上识别重叠的几何对象之间的3D拓扑关系时，3D Cadastre中的用户缺乏降低了视觉任务效率。最终，本研究开辟了3D拓扑关系建模和可视化的新观点。

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