Comportamento agregado da medida de acessibilidade na descrição da morfologia urbana.

Abstract

This study aimed to verify if the aggregate behavior of the measuring Closeness Centrality, which is widely used in urban studies and also known as Accessibility, can reflect relevant aspects of the city as descriptor of the urban system as a whole. In particular, it intends to verify the relations between the accessibility measure to the compaction/fragmentation of urban form and irregularity of the city's network. Therefore, a significant amount of Brazilian medium sized cities are selected in order to acquire a consistent sample capable of presenting an understanding of the implications of the standard statistical distribution of accessibility measure when used in urban studies. It was also aiming to find the links between this measure and the compactness of the urban form and irregularity of the urban network. In the study, it was used some urban models based on graphs and represented by criteria of track centers. According to the data and statistical analyzes it can be seen that accessibility measure has a correlation to the compactness of the city and the irregularity of the urban network. It was found that the best accessibility measure rates are results of more compact cities with more irregular network (with irregularities related to the hierarchy of urban configurational structure in terms of connections).It can also be noted that empty urban spaces directly influence the overall accessibility of the system.