NDVI: What it is and how it's used in Remote Sensing

NDVI (Normalized Difference Vegetation Index) is a vegetation index calculated from the reflectance data of the canopy. It's a measure of the density and health of vegetation in an area, calculated by comparing the reflectance of near-infrared and visible light. NDVI is widely used in remote sensing to monitor vegetation growth and health, and is an important tool for studying climate change, land use, and agriculture.