A 12-chapter introductory eBook about remote sensing. Contents cover (1) Remote Sensing and Geospatial Technology, (2) Energy and Radiation, (3) Airphotos, (4) Digital Imagery, (5) Satellite, Landsat, and MODIS, (6) Preparing Images for Analysis, (7) Band Transformation, (8) Visual Enhancement, (9) Image Classification, (10) Microwave Remote Sensing, (11) Thermal Remote Sensing, and (12) Remote Sensing with Drones. Last update: 2020.