Exploring the generative potential of isovist fields the evolutionary generation of urban layouts based on isovist field properties

Abstract

Isovists and isovist fields can be used to numerically capture the visual properties of spatial configurations (e.g. floor plans or urban layouts). To a certain degree these properties allow one to make statements about how spaces affect people. The question that serves as the starting point of this study is to examine whether spatial configurations ca n generated on the basis of these properties. This question is explored using an experimental approach for the computer-based generation of two-dimensional urban layouts. The spatial arrangements of two-dimensional elements (building-footprints) within a given boundary is optimised in terms of the desired isovist field properties by means of an evolutionary strategy. The paper presents the results of this optimisation and discusses the advantages of this method compared with pattern books as commonly used in architecture.