Nunes

This is the NDVI for part of the Niger Delta for January 2014 derived from Landsat 8 imagery. I am perplexed by it because the river (lower left) is attributed a DN value of 1, although from looking at Google Earth images of the area for the same time period shows a body of water as opposed to an area covered in vegetation....The bands were processed for radiometric correction before generating the Vegetation Index. By comparison, here's the NDVI for January 2017: There the river at the lower left is clearly identified. Could there be some sort of data error with the raw satellite images from 2014, although I have even doubts about that because most of NDVI 2014--beside the river--looks fine.