A New Approach to the Analysis of Visual-Perception Illusion on the Spatial Layout of Urban Elements

 Visual illusions are the most common perceptual illusions, but in urban literature are less addressed. Therefore, the present study seeks to achieve a new approach to analyzing the visual illusion in the layout of urban space elements.

 This research was conducted in 2021 and included scientific-research articles in the field of visual error perception during the years 2000-2020. In this meta-method analysis, all Google ScienceDirect, research gate, and GoogleScholar were examined for classification into research data. 30 related articles were chosen. Design based on meta-method analysis, for perceiving the mechanism of visual error perception in the arrangement of urban elements and locating the focal point in the city, visual error "change the size-distance of urban landscapes", as a developmental and experimental method, in a sample of urban space with focal point and background Visually modeled using SketchUp 2017 software.

 The main components of the methodology of the visual illusion studies were determined by using the metamethod combined method. Based on this methodology, a specific Visual illusion of the change of the size in 3d urban space and Landolt C visual acuity chart was modeled by using SketchUp software. The specific nature of this visual illusion was characterized, and the ability of the SketchUp software and the visual acuity chart of Landolt C in the analysis of the Visual illusion was determined. 

 A Turning and design point, namely point M, was presented By modeling the size perception illusion. Hence the focal point of urban space with comparison its background before and after point M is perceived differently. This point and its specific illusion create a specific potential for planning the urban spatial system and the dominance of focal points in specific tourism and memorial corridors.