Este trabalho apresenta um mapeamento do uso e cobertura da terra da Ilha de Santa Catarina com base em aerofotografias de alta resolução espacial e na vetorização da Restituição Aerofotogramétrica do Instituto de Planejamento Urbano de Florianópolis (IPUF) na escala 1:2.000. O método de interpretação das classes de mapeamento foi efetuado através da análise e interpretação visual de um mosaico aerofotogramétrico e o sistema de mapeamento foi organizado em 17 classes. Os resultados obtidos revelam o predomínio das classes de vegetação e do tecido urbano. As análises revelaram uma urbanização com densidade pontual e a presença de núcleos densos somente nas antigas áreas de povoamento, nas que abrigam grandes empreendimentos imobiliários ou de planejamento urbano.

This paper presents a methodological protocol that combines a structural and a morphological approach to classify residential buildings into spatial patterns of urban growth. Variography analysis is employed to endogenously detect thresholds of building agglomerations, subsequently used as distance parameters for series of morphological closings over the distribution of the building centroids. The different bounding regions ultimately allow classifying new residential buildings into different categories according to their degrees of clustering/scattering and to their locations within/without existing urban structures and within/without recent urban sprawl. The protocol, developed for areas where suburbs tend to proliferate, is tested on a region in southern France using residential buildings in 2002, 2017, and those that appeared between these two dates. It successfully classified the new buildings into the following categories: “clustered infill urban densification”, “scattered infill urban densification”, “low-density edge-expansion”, “compact edge-expansion”, “low-density scattered urban development”, and “leapfrog urban development” thus showing that new residential buildings are not contributing to urban sprawl and development in a similar fashion. Open access is provided to the source code and to the test region data.

Different spatial patterns of urban growth exist such as infill, edge-expansion and leapfrog development. This paper presents a methodology, and a corresponding script, that classify new residential buildings as patterns of urban growth. The script performs a combination of variography and morphometry over building centroids on two different dates. The test data is made of the building centroids of 2002 and 2017 for Centre-Var, a region located in southern France. The different bounding regions, yield from series of morphological closings, allow classifying the building centroids that appeared between 2002 and 2017 into different categories of spatial patterns of urban growth. The final classification is made according to the degree of clustering/scattering of new centroids and to their locations regarding existing urban areas. Preliminary results show that this protocol is able to provide useful insights regarding the degree of contribution of each new residential building to the following patterns of urban growth: clustered infill, scattered infill, clustered edge-expansion, scattered edge-expansion, clustered leapfrog and scattered leapfrog. Open access to the script and to the test region data is provided.

Dans les travaux portant sur la croissance urbaine, le front d’urbanisation est généralement mentionné. Cependant, ce terme qui est entré dans le langage courant du géographe, n’a pas de définition arrêtée, et ses représentations cartographiques sont peu fréquentes. Cet article propose d’une part, une réflexion autour de la notion de front d’urbanisation et une mise en perspective avec la théorie des discontinuités de Roger Brunet, et d’autre part, une démarche de détection des fronts d’urbanisation fondée sur une modélisation spatio-morphologique, ainsi qu’une typologie de ces derniers, à partir d’une application portant sur l’espace du Centre Var, en France.

This paper presents a script that classify spatial patterns of residential urban growth using a morpho-structural approach. The script performs a combination of variography analysis and morphological closings over buildings possessing a residential function in 2002 and 2017 within a region located in southern France named Centre-Var. The different bounding regions then allow classifying new residential buildings into different categories according to their degrees of clustering/scattering and to their locations regarding existing urban areas. Preliminary results show that this protocol is able to provide useful insights regarding the degree of contribution of each new residential building to different patterns of urban growth (clustered infill, scattered infill, clustered edge-expansion, scattered edge-expansion, clustered leapfrog and scattered leapfrog). Open-access to the script and to the test region data is provided.