The following videos show how to work with remote sensing imagery from USGS, USDA, ESA, and NASA with QGIS, SAGA GIS, SNAP, and Pix4Dmapper. The videos run about 40-70 minutes. Please use the YouTube link, and the video will open in a new tab. Then, expand the video description by clicking the "Show More" link, and time stamps to sub-topics will appear with hyper-links.