Public displays have the potential to reach a broad group of stakeholders and stimulate learning, particularly when they are interactive. Therefore, we investigated how people interact with 3D objects shown on public displays in the context of an urban planning scenario. We report on an elicitation study, in which participants were asked to perform seven tasks in an urban planning scenario using spontaneously produced hand gestures (with their hands) and phone gestures (with a smartphone). Our contributions are as follows: (i) We identify two sets of user-defined gestures for how people interact with 3D objects shown on public displays; (ii) we assess their consistency and user acceptance; and (iii) we give insights into interface design for people interacting with 3D objects shown on public displays. These contributions can help interaction designers and developers create systems that facilitate public interaction with 3D objects shown on public displays (e.g. urban planning material).
Traditional methods of public consultation offer only limited interactivity with urban planning materials, leading to a restricted engagement of citizens. Public displays and immersive virtual environments have the potential to address this issue, enhance citizen engagement and improve the public consultation process, overall. In this paper, we investigate how people would interact with a large display showing urban planning content. We conducted an elicitation study with a large immersive display, where we asked participants (N = 28) to produce gestures to vote and comment on urban planning material. Our results suggest that the phone interaction modality may be more suitable than the hand interaction modality for voting and commenting on large interactive displays. Our findings may inform the design of interactions for large immersive displays, in particular, those showing urban planning content.
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