3D Geovisualization; 3D Cadastre; 3D Viewpoint; Topological relationship; Easement; Camera; Occlusion
Abstract :
[en] 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.
Neuville, Romain ; Université de Liège - ULiège > Département de géographie > Unité de Géomatique - Topographie et géométrologie
Jacynthe, Pouliot; Université Laval > Département des Sciences géomatiques
Billen, Roland ; Université de Liège - ULiège > Département de géographie > Unité de Géomatique - Topographie et géométrologie
Language :
English
Title :
3D Viewpoint Optimization of Topological Relationships: Application to 3D Cadastre for Visual Easement Validation
Publication date :
03 September 2020
Event name :
15th 3D GeoInfo Conference
Event place :
London, United Kingdom
Event date :
September 7th - 11th 2020
Audience :
International
Journal title :
ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
ISSN :
2194-9042
eISSN :
2194-9050
Publisher :
Copernicus, Goettingen, Germany
Special issue title :
15th 3D GeoInfo Conference
Volume :
VI-4/W1-2020
Pages :
135-142
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
CRSNG RGPIN2015-05514 and the Merit scholarship program for foreign students provided by the FRQNT Ordnance Survey GB (https://www.ordnancesurvey.co.uk) and 1Spatial (https://1spatial.com/)
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