Concepts for Cartography-Oriented Visualization of Virtual 3D City Models

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Abstract:

Virtual 3D city models serve as an effective medium with manifold applications in geoinformation systems and services. To date, most 3D city models are visualized using photorealistic graphics. But an effective communication of geoinformation significantly depends on how important information is designed and cognitively processed in the given application context. One possibility to visually emphasize important information is based on non-photorealistic rendering, which comprehends artistic depiction styles and is characterized by its expressiveness and communication aspects. However, a direct application of non-photorealistic rendering techniques primarily results in monotonic visualization that lacks cartographic design aspects. In this work, we present concepts for cartography-oriented visualization of virtual 3D city models. These are based on coupling non-photorealistic rendering techniques and semantics-based information for a user, context, and media-dependent representation of thematic information. This work highlights challenges for cartography-oriented visualization of 3D geovirtual environments, presents stylization techniques and discusses their applications and ideas for a standardized visualization. In particular, the presented concepts enable a real-time and dynamic visualization of thematic geoinformation.

German
Virtuelle 3D-Stadtmodelle repräsentieren ein wirkungsvolles und mannigfaltiges Medium in Geoinformationssystemen und -diensten. Häu g wird eine Vielzahl an 3D-Stadtmodellen photorealistisch dargestellt. Eine effektive Kommunikation von Geoinformation beruht allerdings darauf, wie wichtige Informationen innerhalb eines gegebenen Anwendungskontextes gestaltet und kognitiv verarbeitet werden können. Eine Möglichkeit wichtige Informationen visuell hervorzuheben, beruht auf nichtphotorealistischer Bildsynthese, die künstlerische Darstellungsstile umfasst und durch ihre Ausdrucksstärke und kommunikativen Aspekte gekennzeichnet ist. Deren direkte Anwendung resultiert jedoch in einer primär monotonen Gestaltung, bei der kartographische Gestaltungsaspekte nicht berücksichtigt werden. In diesem Beitrag stellen wir Ansätze zur kartographischen Gestaltung virtueller 3D-Stadtmodelle vor. Diese koppeln Techniken der nichtphotorealistischen Bildsynthese mit semantischen Informationen für eine nutzer-, kontext- und medienadäquate Repräsentation von thematischen Informationen. Wir identifizieren Herausforderungen einer kartographischen Gestaltung in 3D geovirtuellen Umgebungen, präsentieren Bildsynthese-Techniken zur kartographischen Gestaltung und diskutieren deren potentielle Anwendungen und Ansätze für einen standardisierten Visualisierungsprozess. Im Besonderen ermöglichen die vorgestellten Ansätze eine echtzeitfähige und dynamische Gestaltung von thematischen Geoinformationen.

Keywords: 3D CITY MODELS; CARTOGRAPHY-ORIENTED VISUALIZATION; REAL-TIME RENDERING; STYLE DESCRIPTION LANGUAGES

Language: German

Document Type: Research Article

DOI: http://dx.doi.org/10.1127/1432-8364/2012/0131

Publication date: August 1, 2012

More about this publication?
  • Photogrammetrie - Fernerkundung - Geoinformation (PFG) is an international scholarly journal covering the progress and application of photogrammetric methods, remote sensing technology and the intricately connected field of geoinformation processing.

    Papers published in PFG highlight new developments and applications of these technologies in practice. The journal hence addresses both researchers and student of these disciplines at academic institutions and universities and the downstream users in both the private sector and public administration.

    PFG places special editorial emphasis on the communication of new methodologies in data acquisition, new approaches to optimized processing and interpretation of all types of data which were acquired by photogrammetric methods, remote sensing, image processing and the computer-aided interpretation of such data in general.

    PFG is the official journal of the German Society of Photogrammetry and Remote Sensing.
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