L ´occupation Du Territoire Vue Par Landsat-TM: Une Nouvelle Perspective Pour Le Quebec Meridional

This study presents a methodology for LANDSAT-TM imagery processing which brings out land use large classes for a complex and diversified area of meridional Quebec. This methodology is based on two decorrelation principles, spectral and visual. Background enhenced image composed of TM5-TM4-PC3, is displayed into Taylor color table with 16 gray levels by channel. Agriculture and water are classified. It appears that TM4 and TM5 of July, used just as it stands, offer a good spectral decorrelation of vegeted covers. TM3 must be replaced by a PC3 which offers a new decorrelated dimension over 1 ess or none vegeted areas. On the other hand, addition of TM3 of May to bands TM3, TM4 and TM5 of July is necessary to agriculture classification. Taylor space gives visual contrast to the data which complete spectral decorrelation.