Towards a Model of Urban Evolution II: Formal Model
This paper is part II of “Towards a model of urban evolution.” This paper defines a formal model of the Signature of an urban space, comprised of: an urban genome which captures the expected groups (i.e., users) and activities (i.e., uses) of physical forms; a description of the actual activities and groups of the physical forms; and the signals that are communicated within and among urban spaces. Central to the model is a formeme, which provides the building blocks for a Signature. A formeme captures the interactions among physical forms, groups and activities. We then show how various metrics can define an urban area based on its Signature, and that these metrics can be used to measure similarity of urban spaces. The Signature and its underlying formemes capture the sources of variations in urban evolution.