NDVI (Normalised Difference Vegetation Index) images - Continental Australia, 1991 -

Normalised Difference Vegetation Index (NDVI) images from Feb. 1991 have been compiled by processing and compositing AVHRR data from the Alice Springs receiving station to a nominal 1km resolution. The NDVI equation produces values in the range of -1.0 to 1.0, where increasing positive values indicate increasing green vegetation and negative values indicate nonvegetated surface features such as water, barren land, ice, and snow or clouds. Each image is compiled from AVHRR data collected over a fortnight.