User Manual - pancroma

This is the result of Adjust file pixels being transferred to the ocean in the redband. Since the ocean does not reflect too much red light, the ocean isespecially dark in this band. The PANCROMA TM gap fill algorithm interpreted thedark ocean pixels as gap pixels and copied the ocean area from the Adjust file.This did not happen in the blue and green bands as the ocean pixels werebrighter in these bands. This may have been avoided by setting the ‘Gap FillThreshold’ value lower. However this may have resulted in some real gap pixelsnot being filled.Gap filling Landsat bands to produce good results is very challenging and timeconsuming. However, important images may well merit the time invested. Notethat although I gap filled an RGB image, gap filling the RGB and PAN files wouldproceed in an analogous fashion.353