Systems for data processing, anaylsis and representation

Allam, Mosaad; Plunkett, Gordon

Bibliographic data

Monograph

Persistent identifier:: 1067490280

Title:: Systems for data processing, anaylsis and representation

Sub title:: ISPRS Commission II Symposium : June 6 - 10, Ottawa, Canada

Scope:: 1 Online-Ressource (XX, 530 Seiten)

Year of publication:: 1994

Place of publication:: Ottawa

Publisher of the original:: The Surveys, Mapping and Remote Sensing, Natural Resources Canada

Identifier (digital):: 1067490280

Illustration:: Illustrationen

Signature of the source:: ZS 312(30,2)

Language:: English

Additional Notes:: Erscheinungsdatum des Originals ist aus dem Copyrightjahr ermittelt.

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Editor:: Allam, Mosaad; Plunkett, Gordon

Corporations:: Symposium Systems for Data Processing, Analysis and Representation, 1994, Ottawa; International Society for Photogrammetry and Remote Sensing; International Society for Photogrammetry and Remote Sensing, Commission Instrumentation for Data Reduction and Analysis; Kanada, Surveys, Mapping and Remote Sensing Sector

Adapter:: Symposium Systems for Data Processing, Analysis and Representation, 1994, Ottawa; International Society for Photogrammetry and Remote Sensing; International Society for Photogrammetry and Remote Sensing, Commission Instrumentation for Data Reduction and Analysis; Kanada, Surveys, Mapping and Remote Sensing Sector

Founder of work:: Symposium Systems for Data Processing, Analysis and Representation, 1994, Ottawa; International Society for Photogrammetry and Remote Sensing; International Society for Photogrammetry and Remote Sensing, Commission Instrumentation for Data Reduction and Analysis; Kanada, Surveys, Mapping and Remote Sensing Sector

Other corporate:: Symposium Systems for Data Processing, Analysis and Representation, 1994, Ottawa; International Society for Photogrammetry and Remote Sensing; International Society for Photogrammetry and Remote Sensing, Commission Instrumentation for Data Reduction and Analysis; Kanada, Surveys, Mapping and Remote Sensing Sector

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2019

Document type:: Monograph

Collection:: Earth sciences

Chapter

Title:: [Friday, June 10, 1994]

Document type:: Monograph

Structure type:: Chapter

Chapter

Title:: [Joint ISPRS/GIS '94 Plenary V]

Document type:: Monograph

Structure type:: Chapter

Chapter

Title:: ADVANCED 3D VISUALIZATION TECHNIQUES COLIN WARE

Document type:: Monograph

Structure type:: Chapter

du ADVANCED 3D VISUALIZATION TECHNIQUES COLIN WARE Faculty of Computer Science, P.O. Box 4400 University of New Brunswick, Fredericton, N.B. E3B 5A3 email: cware @UNB.ca ABSTRACT Highly interactive 3D graphics is on the threshold of becoming affordable and this opens the door to a whole new range of applications. However, while a well defined set of interaction techniques exists for the 2D screen environment, the 3D user interface is evolving rapidly. This paper focuses on the user interface to 3D graphics environments. Novel input devices, 3D widgets, Fly-By techniques, Stereo displays, and Fish Tank virtual reality are discussed within the framework of J.J. Gibson's theory of affordances. L'interface utilisateur pour la visualisation en 3D Le graphisme en 3D hautement interactif est sur le point de devenir abordable et cela ouvre la porte vers toute une panoplie de nouvelles applications. Néanmoins, alors qu'il existe un ensemble bien défini de techniques pour l'environnement de l'écran en 2D, l'interface utilisateur en 3Dévolue rapidement. Cet expose va se concentrer sur l'interface utilisateur pour un environnement graphique en 3D. Des nouveaux périphériques d'entrées, les widgets en 3D, : z . £ 2.3 . ^ . 2 . A > les techniques de survol, la représentation en stéreo, la réalite virtuelle vont etre discutés à travers la notion théorique de J.J. Gibson, 'affordances'. KEY WORDS: 3D views, Geographical Information System, Visual data display. highway planning, appreciating sight lines in urban planning or forestry, and representing ore bodies in 1. INTRODUCTION mining applications are all areas where 3D visualization can help. In general 3D visualization is useful where the structures to be understood are physically displaced in the vertical direction and this displacement is critical to the application. Three dimensional representations will become even more important as GISs evolve into GCADS (Geographical Computer Aided Design Systems). The great contribution of Geographical Information Systems can be seen as an advance from one dimensional information, usually tables of scalar coordinates, to two dimensional information - a map linked to a data base. The methods for manipulating maps are well established and they consist for the most part of scale and translate operations for positioning, as well as point, line and area specification for data input. A third dimension is added to a limited extent in the form of overlays, providing layers of information. However, overlays are a convention for representation, in general the layer does not denote scalar height information. To realize the potential of 3D GIS a number of problems must be solved. In particular, there are new data visualization and manipulation techniques to be invented (after all true 3D output devices are still many years away). While 2D GIS systems have borrowed heavily from the paper maps that preceded them, and which are often the most useful product. 3D GIS has no such antecedents, unless it is the model of the landscape architect. There are other problems related to the need for a the database to support true 3D visualization and to retain volumetric information, and we need to support true 3D queries into that database. These database issues are beyond the scope of this This may all be about to change as high performance 3D graphics systems become commonplace. There are increasing numbers of people experimenting with 3D representations of data and it is becoming clear that this is useful and practical for many applications. For example, understanding the surface topography in 487

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