U.S. Department of Agriculture National Agricultural Statistics Service Research and Development Division |
of the Director |
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Starting in 1999, the images for the entire US (NDVI, Ratio/Previous, and Ratio/Median - as available) for a given period are also being created in an Adobe PDF format. The PDF format allows for browsing user-defined areas and zooming in more closely to view them. The PDF files were created with 256 colors for printing on 8.5"x11" size paper. Anyone with a standard Acrobat reader will be able to view the files. The PDF images have a higher resolution that the GIF files, but are also much larger; PDF images may be as large as 2.0MB.
Starting with the 2004 season, the entire US NDVI composite for each period has been or will be converted to a GeoTiff image for use in geographic information systems software. (2005 will be loaded as available). Due to the size of these files (13-14 MB), each GeoTiff has been compressed into a "Tar" format file for easier download (4-5 MB). Select the "Download" option above to access these tiff files. Standard products are selectable below:
For more information about this topic or about the NASS Spatial Analysis Research Section (SARS), contact the GeoSpatial Information Branch at HQ_RDD_GIB@nass.usda.gov.
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NOAA-17: | 2007 | 2006 | 2005 | 2004 | |
NOAA-16: | 2003 | 2002 | 2001 | ||
NOAA-14: | 1999 | 1998 | 1997 | 1996 | 1995 |