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

Neuville, Romain; Pouliot, Jacynthe; Poux, Florent; Rudder, Laurent De; Billen, Roland

doi:10.3390/ijgi7050194

Cited by 20 publications

(20 citation statements)

References 59 publications

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“…In this research, the 3D geometric object is in three dimensions and the projection surface is plane. Then, a 3D viewpoint of the object can be produced based on the configuration of three parameters [20]: The camera position, orientation, and the focal length. The camera position and orientation are 3D vectors that, respectively, represent a 3D location and a 3D viewing direction into the world coordinate system.…”

Section: Viewpoint Management Algorihtmmentioning

confidence: 99%

Identification of the Best 3D Viewpoint within the BIM Model: Application to Visual Tasks Related to Facility Management

2019

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Visualizing building assets within building information modeling (BIM) offers significant opportunities in facility management as it can assist the maintenance and the safety of buildings. Nevertheless, taking decisions based on 3D visualization remains a challenge since the high density of spatial information inside the 3D model requires suitable visualization techniques to achieve the visual task. The occlusion is ubiquitous and, whilst solutions already exist such as transparency, none currently solve this issue with an automatic and suitable management of the camera. In this paper, we propose the first RESTful web application implementing a 3D viewpoint management algorithm and we demonstrate its usability in the visualization of assets based on a BIM model for visual counting in facility management. Via an online questionnaire, empirical tests are conducted with architects, the construction industry, engineers, and surveyors. The results show that a 3D viewpoint that maximizes the visibility of 3D geometric objects inside the viewport significantly improves the success rate, the accuracy, and the certainty of a visual counting task compared to the traditional four side points of view (i.e., from the front, back, left, and right viewpoints). Finally, this first validation lays the foundation of future investigations in the 3D viewpoint usability evaluation, both in terms of visual tasks and application domains.

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Section: Viewpoint Management Algorihtmmentioning

confidence: 99%

Identification of the Best 3D Viewpoint within the BIM Model: Application to Visual Tasks Related to Facility Management

2019

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“…However, based on the review in [20], 3D geovisualization is commonly performed arbitrarily. Whilst 3D viewers provide a lot of tools for visualizing 3D geospatial data (e.g., type of projection, view controls, and transparency) [21], they still do not incorporate design instructions to assist end users.…”

Section: D Geovisualization and Urban Planningmentioning

confidence: 99%

“…For instance, the shadow cast from a new building onto the neighborhood is not always easy to assess and we do believe that this situation is essentially due to the failure to assist users in the visualization of 3D geospatial data. Consequently, we defined in [20] a 3D geovisualization framework that connects visualization techniques and defines their consistency according to four kinds of connections: compatibility, incompatibility, potential incompatibility, and consequence. Effective visual combinations, i.e., without any graphical conflicts, can thus be found, leading to addressing the visualization of 3D geospatial models in a comprehensive and integrated way.…”

Section: D Geovisualization and Urban Planningmentioning

confidence: 99%

“…In this paper, we enhance the 3D geovisualization framework of [20] with a theoretical and operational solution to manage occlusion in virtual 3D city models. Whilst this latter is one of the most fundamental depth cues [22], it can also make the representativeness of features and their spatial relationships more complex [23].…”

Section: D Geovisualization and Urban Planningmentioning

confidence: 99%

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3D Viewpoint Management and Navigation in Urban Planning: Application to the Exploratory Phase

et al. 2019

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3D geovisualization is essential in urban planning as it assists the analysis of geospatial data and decision making in the design and development of land use and built environment. However, we noted that 3D geospatial models are commonly visualized arbitrarily as current 3D viewers often lack of design instructions to assist end users. This is especially the case for the occlusion management in most 3D environments where the high density and diversity of 3D data to be displayed require efficient visualization techniques for extracting all the geoinformation. In this paper, we propose a theoretical and operational solution to manage occlusion by automatically computing best viewpoints. Based on user’s parameters, a viewpoint management algorithm initially calculates optimal camera settings for visualizing a set of 3D objects of interest through parallel projections. Precomputed points of view are then integrated into a flythrough creation algorithm for producing an automatic navigation within the 3D geospatial model. The algorithm’s usability is illustrated within the scope of a fictive exploratory phase for the public transport services access in the European quarter of Brussels. Eventually, the proposed algorithms may also assist additional urban planning phases in achieving their purposes.

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“…Besides the issue of LOD, there is also an issue of which visualisation technique (visual variables) to use. In a recent study, Neuville et al [40] defined a set of graphic design guidelines for specific tasks using a mathematical formalism; the aim of the guidelines are, among others, to define the degree of transparency, shadow, shading, etc. as well as colour hue of objects.…”

Section: Visual Rule Checkingmentioning

confidence: 99%

Automation of Building Permission by Integration of BIM and Geospatial Data

Olsson

Axelsson

Hooper

et al. 2018

IJGI

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Abstract:The building permission process is to a large extent an analogue process where much information is handled in paper format or as pdf files. With the ongoing digitalisation in society, there is a potential to automate this process by integrating Building Information Models (BIM) of planned buildings and geospatial data to check if a building conforms to the building permission regulations. In this study, an inventory of which regulations in the (Swedish) detailed development plans that can be automatically checked or supported by 3D visualisation was conducted. Then, two of these regulations, the building height and the building footprint area, were studied in detail to find to which extent they can be automatically checked by integration of BIM and geospatial data. In addition, a feasibility study of one visual criterion was conducted. One concern when automating the building permission process is the variability of content within the Industry Foundation Classes (IFC) data model. Variations in modelling methods and model content leads to differences in IFC models' content and structure; these differences complicate automated processes. To facilitate automated processes, requirements on the production of IFC models for building permission applications could be defined in the form of model view definitions or delivery specifications.

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

Cited by 20 publications

References 59 publications

Identification of the Best 3D Viewpoint within the BIM Model: Application to Visual Tasks Related to Facility Management

Identification of the Best 3D Viewpoint within the BIM Model: Application to Visual Tasks Related to Facility Management

3D Viewpoint Management and Navigation in Urban Planning: Application to the Exploratory Phase

Automation of Building Permission by Integration of BIM and Geospatial Data

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