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Publicação
Great Lisbon Metropolitan Area land use/cover characterization through multi-temporal and multi-resolution VIS components analysis
Orientador(es)
Resumo(s)
Urban environments are heterogeneous by nature. Hence, to allow quantitative studies
it is necessary to simplify them in combinations of basic land use/cover materials. The Ridd’s VIS
model (1995) is a conceptual representation that allows simplifying urban environments through
the combination of three basic components: vegetation (V), impervious surface (I), and soil (S).
More recently, Lu and Weng (Lu & Weng 2004) successfully tested a new combination (vegetation,
impervious surface and shadow), more adapted to urban reality.
The majority of urban uses can be interpreted as a combination of those three basic components.
The VIS analysis allows to disclose that the mainstream of urban features has its own VIS signature,
which is difficult to detect through pixel-by-pixel based classifiers. This work examines the land
use/cover characteristics of the Great Lisbon Metropolitan Area (GAML) using sub-pixel classification
techniques, mainly linear spectral unmixing (LSU), developing a conceptual model to characterize
the occupation standards. The LSU ability to measure the physical composition of urban morphology
is also explored and tested.
In this work we use Landsat 5 TM multispectral images (1987 and 1997), Landsat 7 ETM+
panchromatic and multispectral images (2000) and SPOT 5 HRVIR panchromatic (2.5 m supermode
pixel size) and multispectral images (2004), evaluating at the same time the land use/cover signatures
evolution and the effect of spatial resolution differences on the same signatures measurements.
Descrição
Palavras-chave
Remote sensing VIS model Linear Spectral Unmixing Urban land use/cover
Contexto Educativo
Citação
Tenedório J.A., Rocha J., Encarnação S., & Estanqueiro R. (2006). Great Lisbon Metropolitan Area land use/cover characterization through multi-temporal and multi-resolution VIS components analysis. In. A. Marçal (ed.). Global Developments in Environmental Earth Observation from Space (pp. 495-502). Millpress. ISBN 90-5966-042-0.