Measuring Surrounding Space to Assess the Pedestrian Visual Aperture Angle in the Urban Fabric: Toward a Kurtosis-Based Isovist Indicator

Thomas Leduc (1, 2) , Vincent Tourre (1, 2) , Philippe Woloszyn (3) , Francis Miguet (1, 2)

1 CERMA - Centre de recherche méthodologique d'architecture
2 AAU - Ambiances architecturales et urbaines
3 ESO - Espaces et Sociétés

Partial isovists fields are useful methods to analyze the urban morphology taking into account the visual perception of the pedestrian. However, as previous studies involve a constant visual aperture angle all along the pathway, this paper presents an adaptative method of aperture angular variation according to urban morphology properties. Aperture angle increasing, nearby a square or at roads junction, or decreasing within a canyon street should improve the micro-behavior visual perception in our simulations. With showing that traditional isovist's shape indicators are not well adapted to achieve urban environmental properties, the aim of this paper is to present this new methodology based on a statistics standardized moment called Kurtosis. Our results show that this method could be used to define a surrounding space typology, one step more towards the modeling of visual dynamics.

Mots clés: isovist; function of radial distance; statistics moment; Kurtosis; geoprocessing; urban environmental visual properties

Domaines: Modélisation et simulation; Architecture, aménagement de l'espace; Environnement et Société

Thomas Leduc, Vincent Tourre, Philippe Woloszyn, Francis Miguet. Measuring Surrounding Space to Assess the Pedestrian Visual Aperture Angle in the Urban Fabric: Toward a Kurtosis-Based Isovist Indicator. Vasily V. Popovich; Christophe Claramunt; Thomas Devogele; Manfred Schrenk; Kyrill Korolenko. Information Fusion and Geographic Information Systems - Towards the Digital Ocean, 5, Springer Berlin Heidelberg, pp.129-142, 2011, 978-3-642-19765-9. ⟨10.1007/978-3-642-19766-6_11⟩. ⟨hal-01347331⟩