Évaluation du potentiel de la télédétection spatiale pour l'étude du milieu urbain : le cas de Montréal

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Abstract
Satellite imagery in multispectral mode actually available is provided by MSS (multispectral scanner) and TM (thematic mapper) sensors aboard the American satellite LANDSAT-5. Potential use of this type of data for study of the urban environment is quite relevant, as it associates speed of analysis with competitive cost.Using as an example the study of the Montréal, Quebec region, enhanced color composite image production demonstrates the possibilities of TM data in the photo-interpretation of urban characteristics owing to better spatial resolution. On the other hand, the thematic analysis of land units using automatic classification techniques for cartographic purposes gives five land-use classes. These correspond quite well to the classification used by urbanists for major urban functions. The mean accuracy in terms of area is in the order of 97% for the total of urban areas and 75% for each class.

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