NDVI data calculated from the AVHRR sensor on the NOAA-16 satellite are
used to create vegetation condition imagery beginning with the 2001 crop
season. The images selectable below include displays of the NDVI composite
index for the entire United States in either GIF or PDF format. The PDF
format has a higher resolution and allows browsing. Agricultural
Statistics District (ASD) and state boundaries are shown. Images (in GIF
format only) containing nine-period thumbnails are available to allow season
review.