Specifying the Representation of Non-geometric Information in 3D Virtual Environments

Bazargan, Kaveh; Falquet, Gilles

doi:10.1007/978-3-642-02577-8_85

Cited by 7 publications

(5 citation statements)

References 9 publications

(8 reference statements)

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“…For visualization purposes, this variety of data implies elaborating solutions that still guarantee the understanding of underlying information: e.g., comprehending ownership boundaries, retrieving ownership information, analyzing 3D spatial relationships. To this end, occlusion management and enhancement techniques are extremely suitable as they facilitate geospatial data exploration (Bazargan and Falquet, 2009;Trapp et al, 2011). For example, transparency and 3D explosion probe can significantly improve the visual discovery of objects enclosed or contained within other objects (e.g., rooms inside buildings, pipes and electricity networks under the ground) (Assarsson et al, 2006;Coffin and Höllerer, 2006;Sonnet et al, 2004).…”

Section: Context and Problematicsmentioning

confidence: 99%

3d Viewpoint Optimization of Topological Relationships: Application to 3d Cadastre for Visual Easement Validation

Neuville

Pouliot

Billen

2020

ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci.

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Abstract. 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.

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Section: Context and Problematicsmentioning

confidence: 99%

3d Viewpoint Optimization of Topological Relationships: Application to 3d Cadastre for Visual Easement Validation

Neuville

Pouliot

Billen

2020

ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci.

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“…Besides static visual variables and 3D environment settings, additional techniques have been developed in order to improve the visualization of 3D geospatial environments. Bazargan and Falquet [51] show the suitability of seven enhancement techniques (illustrative shadows, virtual PDA, croquet 3D windows, croquet 3D interactor, 2D medial layer, sidebar, and 3D labels) for the depiction of non-geometric information, while Trapp et al [52] classify object-highlighting techniques useful for the visualization of user's selection, query results, and navigation. The classification is carried out based on the type of rendering: style-variance techniques (focus-based style or context-based style), outlining techniques, and glyph-based techniques.…”

Section: Enhancement Techniquesmentioning

confidence: 99%

A Formalized 3D Geovisualization Illustrated to Selectivity Purpose of Virtual 3D City Model

Neuville

Pouliot

Poux

et al. 2018

IJGI

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Virtual 3D city models act as valuable central information hubs supporting many aspects of cities, from management to planning and simulation. However, we noted that 3D city models are still underexploited and believe that this is partly due to inefficient visual communication channels across 3D model producers and the end-user. With the development of a formalized 3D geovisualization approach, this paper aims to support and make the visual identification and recognition of specific objects in the 3D models more efficient and useful. The foundation of the proposed solution is a knowledge network of the visualization of 3D geospatial data that gathers and links mapping and rendering techniques. To formalize this knowledge base and make it usable as a decision-making system for the selection of styles, second-order logic is used. It provides a first set of efficient graphic design guidelines, avoiding the creation of graphical conflicts and thus improving visual communication. An interactive tool is implemented and lays the foundation for a suitable solution for assisting the visualization process of 3D geospatial models within CAD and GIS-oriented software. Ultimately, we propose an extension to OGC Symbology Encoding in order to provide suitable graphic design guidelines to web mapping services.

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“…Voigt & Polowinski (2011) aim at developing a unifying ontology applicable in visualization systems. Bazargan and Falquet (2009) have proposed to use description logics to represent the usability of techniques in a given context and to reason about it.…”

Section: Visualization Ontologies or Taxonomiesmentioning

confidence: 99%

A Repository of Information Visualization Techniques to Support the Design of 3D Virtual City Models

Métral

Ghoula

Silva

et al. 2014

Lecture Notes in Geoinformation and Cartography

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KEY WORDS: 3D visualization, information visualization, 3D city model, 3D virtual environment, 3D GIS, knowledge base ABSTRACT:Virtual 3D city models are used for different applications such as urban planning, navigation, pedestrian behaviour, historical information, and disaster management. These applications require rich information models that associate urban objects not only with their geometric properties but also with other types of information. When designing such models the choice of visualization techniques is far from trivial because the city objects must be displayed together with additional information, such as historical facts, planning projects, pollutant concentration, noise level, etc. Finding relevant techniques depends on a set of criteria such as the type of information, but also on the tasks that will be performed and the associated context. Furthermore, a technique that is relevant when used in isolation may generate visual incompatibilities when used in conjunction with another one. We have defined a model for the representation of information visualization techniques in 3D city models. We have implemented this model in the form of an ontology and a knowledge base of techniques currently used in 3D city models or 3D GIS. The goal of such an approach is to provide a knowledge repository to support the design of 3D virtual city models in which non-geometric information must be presented. In this paper we describe the model and the ontology of information visualization techniques that we designed. We also show how the associated knowledge base can be used for the selection of visualization techniques depending on different criteria including task and context, and for the detection of visual incompatibilities between techniques when used in the same scene.

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Specifying the Representation of Non-geometric Information in 3D Virtual Environments

Cited by 7 publications

References 9 publications

3d Viewpoint Optimization of Topological Relationships: Application to 3d Cadastre for Visual Easement Validation

3d Viewpoint Optimization of Topological Relationships: Application to 3d Cadastre for Visual Easement Validation

A Formalized 3D Geovisualization Illustrated to Selectivity Purpose of Virtual 3D City Model

A Repository of Information Visualization Techniques to Support the Design of 3D Virtual City Models

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