Enhanced Vegetation Index
October 26, 2001
The above map was composited using a number of images from the Moderate-resolution Imaging Spectroradiometer (MODIS) sensor on board the Terra satellite. It shows an enhanced vegetation index (EVI) for the entire globe With this EVI map, scientists are able to quantify plant growth and vegetation density over the entire globe, using visible and near-infrared light reflected by land surface features. Very low values of EVI (white and brown areas)correspond to barren areas of rock, sand, or snow. Moderate values (light greens) represent shrub and grassland, while high values (near 1.0) indicate temperate and tropical rainforests (dark greens).