Authors: Dafna Fisher-Gewirtzman
In this paper we compare four urban built typologies all based on a similar framework area. Each typology is characterizes by a different building morphology and enables a different atmosphere for its inhabitants as well as for pedestrians with regards to distance between buildings and in relation to the surrounding view. The objective of this study is to use the 3D Line Of Sight Visibility Analysis as a simulation of how humans visualize the urban environment in two separate and distinct modes: the static viewpoint from selected facade locations (as if viewing from a window) and a dynamic 3D LOS Visibility Analysis from a typical pedestrian path in each case-study. In this study we base our work on the assumption that 3D visibility calculations can be an indication of the human perception of space. The visibility calculation results from each case-study present very clearly the differences between each urban fabric, the change in the urban morphology and additional visible elements along each path. The 3D LOS visibility model proved itself to be very accurate in simulating actual visibility from any view-point, whether static or dynamic (along a path). The model can be expanded to regard any relevant visible element in the built and urban environment. This model could help explain various urban phenomena, and can be used to analyze and evaluate existing urban environments as well as a tool to evaluate future planning and design alternative proposals for better future urban environments.
Keywords: visibility; 3D visual analysis; Urban typologies; pedestrian paths; perception of space