Morpho-spatial extraction of urban nuclei in diffusely urbanized metropolitan areas
Por:
Couturier, S, Ricardez, M, Osorno, J, Lopez-Martinez, R
Publicada:
30 jun 2011
Resumen:
Remote sensing has permitted estimates of the built-up surface as a regional measure of urban sprawl. However, the accuracy of the estimates and the urban forms associated with this measure are still scarcely documented, especially on the periphery of metropolitan areas where urban land use is scattered in the landscape. An operational framework is presented for the structural description of metropolitan urbanization at regional scale, with a view to enhancing the urban cartography in Mexico. This framework is composed of (1) the extraction of the regional urban sprawl pattern, (2) the accuracy estimate per population density zone, and (3) the automated extraction of urban nuclei within this pattern. The method was applied to the Toluca-Atlacomulco valley, a significant component of the diffuse urbanization surrounding Mexico City. In the first step, a Landsat TM image is classified using a decision tree based on prior knowledge and a combination of unsupervised and supervised algorith
Filiaciones:
Univ Nacl Autonoma Mexico, Inst Geografia, Lab Anal Geoespacial LAGE, Mexico City 04510, DF, Mexico
Univ Nacl Autonoma Mexico, Inst Geografia, Dept Geografia Social, Mexico City 04510, DF, Mexico
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