Integration des SIG et de la teledetection pour I'etude des changements dans le paysage forestier du nord-ouest du Nouveau-Brunswick entre 1985 et 1999

摘要

The objective of this study is to detect changes in north-west New Brunswick forest between 1985 and 1999 using Landsat data. The first image from Landsat 5 (TM) was acquired in August 18, 1985 and the second (Landsat 7, ETM) was from June 30, 1999. A linear combination of spectral bands has been used to improve the contrast between different forest cover types in the study region. A supervised classification scheme was adopted and five forest cover types were identified. The classification accuracy was in the order of 96% for both images. The results indicated that 47% of the study area were unchanged during the 14-year period, while 30% of the forest-covered areas were affected by perturbations. It can be observed also that 17% of forested and non-forested areas were transformed into regeneration during that period.