Stähli, Lisa; Giannopoulos, Ioannis; Raubal, Martin
Evaluation of pedestrian navigation in Smart Cities Journal Article
In: Environment and Planning B: Urban Analytics and City Science, vol. 48, no. 6, pp. 1728–1745, 2021.
This work addresses recent research in the area of pedestrian navigation aids that aims at finding alternatives to the widely used map-based turn-by-turn navigation systems in the context of Smart City environments. Four different approaches of pedestrian navigation systems were compared to each other in a user experiment that was conducted in a virtual environment: (1) map-based, (2) landmark-based, (3) augmented reality, and (4) public display navigation. The results of the experiment with 45 participants conducted in a virtual environment suggest that the augmented reality navigation performs best concerning efficiency and effectiveness and the landmark-based navigation performs worst in the context of Smart Cities.
Navratil, Gerhard; Konturek, Philip; Giannopoulos, Ioannis
Interacting with 3D Models - 3D-CAD vs. Holographic Models Journal Article
In: ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, vol. VI-4/W1-2020, pp. 129–134, 2020.
A problem with 3D models is that devices used to display them are typically two-dimensional, i.e., computer monitors or printed maps. User interfaces of computer software are based on mouse, touchscreen, keyboards, etc. and are optimized for this dimensionality. However, this causes problems when working with 3D models and the user must adapt her actions by interpreting the missing third dimension. While this might not necessarily pose a problem for frequent users, infrequent users may find this quite challenging. Holographic models, on the other hand, float in front of the user, providing a 3D perspective. Interaction with this kind of models may thus be more intuitive than traditional interaction. In the paper we present the results from a first user test. 15 participants tested interaction with a holographic model visualized using Augmented Reality (AR) technology. The results were compared to those of 15 participants using a traditional 3D-CAD. It was found that the holographic approach is more intuitive leading to a lower frustration level although it is still restricted by technical limitations.
In: Bulletin TU Wien alumni club, vol. 47, no. Juni, 2019.
Während wir uns im Außenbereich bewegen und mit dem Raum interagieren, nehmen wir nur physische Objekte wie Gebäude, Straßen und andere Fußgänger in der Nähe wahr. Aber unsere Welt ist voll verborgener Informationen, z.B. unterirdischen Elemente, die von der Bodenoberfläche und den Gebäudewänden verdeckt werden oder von georeferenzierten Informationen, die im Internet, aber nicht im realen Raum zu finden sind. Diese Informationen können Geschichten erzählen oder sogar einen bestimmten Ort charakterisieren
Janecka, Karel; Navratil, Gerhard
Geospatial Data in Support of 3D Cadastre Journal Article
In: GIM International, vol. 33, no. 3, pp. 22–25, 2019.
The urbanization trend is leading to an increasing number of people living in cities, thus also placing new demands on cadastral registration. To be able to register the complex infrastructures and built-up areas properly, the cadastre will need to consider the third spatial dimension. The 3D cadastre is based on 3D parcels (spatial units) which are single volumes (or multiple volumes) of space. Although the technology offers numerous possibilities for implementation of the 3D cadastre, there are still some open issues, as this article explains.
Fogliaroni, Paolo; Mazurkiewicz, Bartosz; Kattenbeck, Markus; Giannopoulos, Ioannis
Geographic-Aware Augmented Reality for VGI Inproceedings
In: Gartner, Georg; Huang, Haosheng (Ed.): Advances in Cartography and GIScience of the ICA (ICA-Adv), pp. 3.1–3.9, International Cartographic Association (ICA), 2, 2019, (Vortrag: 15th International Conference on Location Based Services (LBS 2019), Wien; 2019-11-11 -- 2019-11-13).
Volunteered Geographic Information (VGI) has been a constantly growing field over the last decade, but the utilised technologies (i.e., mobile phones) are not able to exploit the full potential concerning effort and accuracy of registering geographic data. This paper introduces the GeoAR Glasses, a novel technology enabling the use of Geographic-Aware Augmented Reality for Mobile Geographic Information Systems (Mobile GIS) and Location-Based Services (LBS). The potentials of the GeoAR Glasses with respect to current mobile mapping applications is shown by means of an in-situ study (N=42) comparing two different modes of collecting VGI data. For the comparison we take into account the accuracy of the mapped data points and the time needed to complete the mapping. The results show that the GeoAR Glasses outperform the mobile application concerning both positional accuracy and completion time.
Navratil, Gerhard; Schwai, Marco; Vollnhofer, Stefan; Konturek, Philip; Giannopoulos, Ioannis
In: van Oosterom, Peter; Dubbeling, Dirk (Ed.): Proceedings 6th International FIG Workshop on 3D Cadastres, pp. 515–528, FIG, 2018, ISBN: 978-87-92853-80-6, (Vortrag: 6th International FIG Workshop on 3D Cadastres, Delft; 2018-10-02 -- 2018-10-04).
The creation of a 3D cadaster faces a number of different challenges. Two of them are the collection of data on already existing 3D structures and the visualization for non-experts. The paper uses Augmented Reality (AR) technology for the visualization of models created from plans required in Austria to create condominiums. The advantages of such an approach would be:par
- Since the plans are required for the creation of condominiums, the data already exist and no additional surveying work is necessary.par
- AR technology might be more intuitive than 3D CAD-systems. Experts in 3D CAD have no problems to work with complex models but the typical person interested in a condominium will have a background in law (e.g., a notary) or economy (e.g., a real estate agent) and people interested in acquiring ownership may have any kind of background.par
The paper shows how to create a model of condominium from floor plans, import it in the AR environment, and interact with the model. The test setup is described and first results are sketched.