What does a high NDVI value indicate?

A high NDVI value, or Normalized Difference Vegetation Index, indicates dense vegetation cover. NDVI is a measure derived from satellite imagery that evaluates the relative difference between near-infrared and visible light reflected from the Earth's surface. Healthy and dense vegetation reflects significantly more near-infrared light compared to other surfaces, such as urban areas or bare soil, which translates into higher NDVI values.

Thus, a high NDVI score is often associated with thriving forests, dense agricultural areas, or healthy grasslands, indicating robust plant growth and biomass. This relationship makes NDVI a valuable tool for identifying areas of vegetation growth and monitoring environmental changes over time.