SummaryThe growing phenomenon of urbanization in developing countries has led to a large number of settlements characterized by a deficient habitat (slums), lacking security of tenure and an adequate provision of urban services that affect the quality of the lives of its citizens. Over time, these settlements are improving their standards of quality in the provision of public services and their security of tenure. The interrelationship between security of tenure, improved urban services and housing improvement provides the key to evaluating the actions that improve the quality of life of its inhabitants. The proposed approach involves the establishment of a methodology for reading the evolution of the forms of urban growth in terms of incremental levels of security of tenure (P), urban services (U), and building (E). In order to develop the analysis, an urban periphery index has been developed, based on the forms of evolutionary growth, improved services and security tenure, as well as on accessibility (distance to the centre and slope). The analysis of the correlation between the urban periphery index and the spatial distribution of social strata and land values, in the evolution of the urbanization of the city of Cucuta (Colombia), highlights the relevance of the elements of the urban periphery index as key factors to improve the quality of life..

Este artículo propone un método de clasificación de tejidos urbanos a partir de un conjunto de variables derivadas de su propia morfología-edificios, parcelas, manzanas y calles-, centrado en el ámbito del Área Metropolitana de Barcelona. Se introducen atributos de densidad en relación a la condición de alineación de vial y la presencia de medianeras que complementan los parámetros más comunes en torno al techo y la huella construida. Se utiliza el algoritmo k-means para construir un conjunto de grupos homogéneos. Los resultados revelan un mosaico de tejidos urbanos nítido, compuesto de 12 grupos disimilares. Se sugiere la futura combinación de los valores de forma obtenidos con otros parámetros no estrictamente físicos-configuración socioeconómica, energía y equidad, entre otrospara evaluar los efectos de la morfología urbana en cada caso. Palabras clave: forma urbana, morfología urbana, análisis de clústeres, SIG DECHIPERING URBAN FORM: A GIS-BASED CLUSTER ANALYSIS ABSTRACT This paper contributes to the classification of urban form on the basis of variables arising from its morphology-buildings, plots, blocks and streets-, taking the case of the Metropolitan Area of Barcelona as a case study.

The contemporary networks of cities continue to expand their force fields by embracing ever larger territories while shaping their interstices in heterogeneous mosaics of infrastructures, settlements and open spaces. The equilibrium of the urban system depends largely on the management of these unavoidable settings, in which the urban form is less sustainable and lacks structure. Although there is extensive literature on this environment, there are fewer instruments based on quantitative methods of analysis. The objective of the article is to evaluate the contribution of the so-called centrality measures in isolation, by merely observing the outcomes. Methodology The centrality measures reach, closeness, betweennes and straigthness are calculated considering radiuses of influence ranging from 300 to 10.000 meters. The midpoints of each segment of the road network represent a possible origin and destination. Conclusions The combined reading of closeness and betweennes allows for the identification of the relative importance of nodes and a set of network skeletons that are linked to each mode of transportfrom non-motorised to motorised means of transport. Originality The metric distance is the adopted impedance to calculate the shortest paths between all origins and destinations, as well as for the selected radiuses of influence that intentionally represent the different modes of transport considered in a modal share.

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Aquest llibre exposa les reflexions i propostes per al traçat viari de l’eix Bracons al seu pas pels municipis de les Preses i de la Vall d’en Bas, considerant especialment la seva comptabilitat amb la continuïtat de l’activitat agrícola i la necessària reordenació de la seva travessera urbana. Es tracta d’una oportunitat per explorar noves metodologies i instruments per al planejament i projecte d’infraestructures. Es presenten els resultats del Workshop organitzat de forma coordinada entre un grup de recerca de la universitat (IntraScapeLab-EXIT-UPC) i una entitat del tercer sector ambiental (CST). L’objectiu és analitzar les interaccions entre infraestructura i territori des d’una lògica de projectes transversal que integri i articuli visions enginyeres, arquitectòniques, ambientals i patrimonials.