Depth Cue of Occlusion Information as Criterion for the Quality of Annotation Placement in Perspective Views

Abstract. In cartography and computational geometry, concepts and techniques for automated label placement have been developed for twodimensional maps. Less is known whether these methods can be applied to annotate geovirtual 3D environments. In this paper we discuss the application of these methods within geovirtual 3D environments and investigate the effects that can possibly harm the information transfer. To achieve high quality labeling readability, visibility, and the unambiguous correlation to the reference have to be ensured. Illustrated by examples, we show that perspective attributes inherently encoded in a depiction have to be considered as well. In particular, we focus on overriding occlusion information by added annotations and the impact on the complexity of the cognition process. A user test verifies our hypothesis that this disturbance is actually noticeable by users.

• Type: Conference
• Year: 2007
• Where: AGILE
• Authors: Stefan Maass, Markus Jobst, Jürgen Döllner
• Keywords: AGILE 2007, Computational Geometry, Geovirtual 3D Environments, Quality Labeling Readability