Materials and Methods
1.2. Data Preparation:
There are distortions and degradations in the raw remote sensing images due to many reasons such as the sensors, the platform and the atmospheric condition when images were taken. Before classification, the raw remote sensing images needs some sort of corrections, which is called the image pre-processing. Remote Sensing image pre-processing includes geometric correction, atmospheric corrections and noise removal. In this study the LANDSAT, LISS III and ASTER images have been geometrically corrected. The field survey data includes the knowledge of the study area and the GPS points recording coordinates of homogeneous landcover types of the area.