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4. Validation of three aircraft noise calculation models.

Author

Meister, Jonas, Schalcher, Stefan, Wunderli, Jean-Marc, and Schäffer, Beat

Subjects
AIRCRAFT noise, NOISE measurement, CONFIGURATION management, SIMULATION methods & models, ACOUSTIC vibrations
Abstract

Aircraft noise affects large areas around airports. Noise calculation programs therefore need to account for air operations with high accuracy. In this contribution, we simulated several thousand single flights with three aircraft noise calculation models, namely sonAIR, FLULA2 and AEDT, and compared the results among each other and with corresponding noise measurements to evaluate their accuracy. While FLULA2 and sonAIR calculations are adjusted to local conditions, AEDT was run with default settings (NPD data and standard procedural profiles) to assess its performance when using unadjusted input data. We found that results of all three programs on average agree well with measurements and with each other. sonAIR is more accurate when using flight configuration data, but also in greater distances to the airports. Exemplarily adaptations of AEDT input data to local conditions showed that such adaptations clearly improve its calculation results. The contribution thus shows that, despite their inherently different modelling approaches, (a) all three programs are on average equally capable of reproducing the sound exposure in the vicinity of airports, (b) adaptions of input data to local conditions substantially improve results and (c) sonAIR is able to reproduce single flights with higher accuracy when provided with flight configuration data. [ABSTRACT FROM AUTHOR]

Published
2023
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8. Augmenting Printed School Atlases with Thematic 3D Maps.

Author

Schnürer, Raimund, Dind, Cédric, Schalcher, Stefan, Tschudi, Pascal, and Hurni, Lorenz

Subjects
DIGITIZATION, CARTOGRAPHY, VISUALIZATION, TOPOGRAPHY, TABLET computers
Abstract

Digitalization in schools requires a rethinking of teaching materials and methods in all subjects. This upheaval also concerns traditional print media, like school atlases used in geography classes. In this work, we examine the cartographic technological feasibility of extending a printed school atlas with digital content by augmented reality (AR). While previous research rather focused on topographic three-dimensional (3D) maps, our prototypical application for Android tablets complements map sheets of the Swiss World Atlas with thematically related data. We follow a natural marker approach using the AR engine Vuforia and the game engine Unity. We compare two workflows to insert geo-data, being correctly aligned with the map images, into the game engine. Next, the imported data are transformed into partly animated 3D visualizations, such as a dot distribution map, curved lines, pie chart billboards, stacked cuboids, extruded bars, and polygons. Additionally, we implemented legends, elements for temporal and thematic navigation, a screen capture function, and a touch-based feature query for the user interface. We evaluated our prototype in a usability experiment, which showed that secondary school students are as effective, interested, and sustainable with printed as with augmented maps when solving geographic tasks. [ABSTRACT FROM AUTHOR]

Published
2020
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