EFFECT OF ATMOSPHERIC CORRECTION FOR DIFFERENT LAND USE ON LANDSAT 7 ETM+ SATELLITE IMAGERY

Abstract

Various changes in the atmosphere of the earth and different illuminations resulting from rough terrain change the spectral reflection values of satellite images. Studies making use of real reflection values belonging to the object will provide more accurate data. The atmospheric correction process to be applied in this study is used to prevent the negative effects resulting from atmosphere and different illuminations in order to represent the reflections from the ground on the image in the best way possible. Using atmospheric correction, differentiations in reflection values sensed by different sensors or platforms resulting from atmosphere and some technical problems will be prevented. In this study, the aim is to determine the changes in the spectral reflection values concerning land use following the atmospheric correction to be applied on Landsat image data. For this reason, atmospheric correction was applied on Landsat image data. The relations of each band with each other before and after the correction were determined. The changes between spectral reflection values of all bands before and after correction regarding three different land uses as forest, agricultural area and residential area were examined visually and statistically.