The main objective of this study was to obtain drought maps from medium spatial resolution
images. These images were fused for enhance spatial resolution and to monitor drought conditions
we used the fundamental physical properties relating to wavelength measurements in the visible
(red), near infrared and short wave infrared, i.e. NDVI (Normalized Difference Vegetation Index),
NDWI (Normalized Difference Water Index) and NDDI (Normalized Difference Drought Index).