Orthorectification is an important step in generating accurate land use/land cover (LULC) from satellite imagery. particularly in urban areas with high-rise buildings. Such buildings generally appear as oblique shapes on very-high-resolution (VHR) satellite images. which reflect a bigger area of coverage than the real built-up area on LULC mapping. https://www.chiggate.com/chromatics-6nn-6-0-natural-ultra-rich-cheap/