In city centres where public space is at a premium, checklists and images of design quality attributes generated from observations of successful public spaces are increasingly being utilised in designs of new or refurbished areas. This replication assumes the success and popularity of these elements will generalise to other locations. However, the accuracy and reliability of observations in using current methods of behaviour mapping can miss important details in the small and often crowded successful public spaces. Coding of time interval photographic records of public spaces in Geographic Information System (GIS) is introduced as a data collection methodology for mapping and analysing behaviour. The results indicate that actualised affordance is a function of the spatial configuration of design elements with respect to the number of users, the availability of choice, climate (sun and shade), and the enclosure and exposure of design elements within subspaces. Although design elements are selected for their potential affordance, actualised affordance is defined by the configuration within which elements are embedded in a specific location.