Streets have different forms that are not defined only by their partitions, furniture, and width, but also by their edges as vital features of their spatiality. The relationship between a street and a building impacts the street interface configurations, resulting in various topological characteristics. Thus, the street interface is a physical entity that is produced by the interrelationship between urban morphological elements (street and building), and the way it is formed and used affects the livability of the street. The methods used in the current study contribute to an empirical urban morphological–visual cognitive investigation of arterial street interface configurations, particularly on the ground floor level, to assess potential relations between variations in the physical configurations that influence pedestrian visual perception using mobile eye-tracking glasses. In conclusion, this study contributes to research into developing a spatial framework for arterial street liveability, addressing the pilot case study of Avenida da República in Lisbon.

Among the European coastal territories most vulnerable to the effects of mean sea level rise, such as flooding and erosion phenomena, are the 943 km of the Portuguese coastline where approximately 70 per cent of the population lives (Bigotte et al, 2014), a percentage that rises to around 80 per cent in the summer months, due to tourism (Andrade et al, 2002), especially in the Algarve region (southern Portugal). The case study of this research is the urban public space in the coastal city of Quarteira, which is particularly vulnerable. This space between the land and the sea has been recently framed in the inter-municipal climate change adaptation plan PIAAC-AMAL (Plano Intermunicipal de Adaptação às Alterações Climáticas do Algarve). The aim of the article is to explore the natural and anthropogenic process of formation and transformation of the urban space between the land and sea that occurred over time, up to the definition of the seashore street. Interpretative drawing is used as a methodology to understand the form of the public space. This is considered the first step for designing the public space between the land and the sea that deals both with the effects of climate change and the seasonal cycles of summer tourism. Through this analysis, it is argued that the understanding of the form (morphological characteristics) of this continuous space between land and sea is fundamental for consistent and robust adaptation design.