USDA, NASS, RESEARCH AND DEVELOPMENT DIVISION

U.S. Department of Agriculture
National Agricultural Statistics Service
Research and Development Division

Census and Survey Research Branch Data Quality | Statistical Methodology

Geospatial Information Branch Area Frame | Spatial Analysis

Starting with the 2001 season, the entire US NDVI composite for a biweekly period was converted to a GeoTiff image for use in geographic information systems software. (2007 will be loaded as the growing season progresses). For 2001 through 2003, only the even biweekly periods were processed and available for downloading. As with the graphics products, these images are not water vapor corrected. 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), Winzip can be used to uncompress the files. Filenames for download are arranged by biweekly 'Period' number within 'year'; numbers for comparable periods are shown in red in the table below.

The AVHRR images are projected using the Lambert Azimuthal Equal Area projection, with image characteristics of 1,000 x 1,000 meter pixels, an upper left "X" coordinate of -2,050,000 and an upper left "Y" coordinate of 752,000 , single band, 8 bits, Band Interleaved by Pixel (BIP), number of rows 2889 and columns 4587 and no header bytes.

2004-2008 Comparable Biweekly Periods
Period	2001	2002	2003	2004	2005	2006	2007	2008
12	03/09-03/22	03/08-03/21	03/12-03/25	03/11-03/24	03/09-03/22	03/08-03/21	03/06-03/19	03/11-03/24
13				03/18-03/31	03/16-03/29	03/15-03/28	03/13-03/26	03/18-03/31
14	03/23-04/05	03/22-04/04	03/26-04/08	03/25-04/07	03/23-04/05	03/22-04/04	03/20-04/02	03/25-04/07
15				04/01-04/14	03/30-04/12	03/29-04/11	03/27-04/09	04/01-04/14
16	04/06-04/19	04/05-04/18	04/09-04/22	04/08-04/21	04/06-04/19	04/05-04/18	04/03-04/16	04/08-04/21
17				04/15-04/28	04/13-04/26	04/12-04/25	04/10-04/23	04/15-04/28
18	04/20-05/03	04/19-05/02	04/23-05/06	04/22-05/05	04/20-05/03	04/19-05/02	04/17-04/30	04/22-05/05
19				04/29-05/12	04/27-05/10	04/26-05/09	04/24-05/07	04/29-05/12
20	05/04-05/17	05/03-05/16	05/07-05/20	05/06-05/19	05/04-05/17	05/03-05/16	05/01-05/14	05/06-05/19
21				05/13-05/26	05/11-05/24	05/10-05/23	05/08-05/21	05/13-05/26
22	05/18-05/31	05/17-05/30	05/21-06/03	05/20-06/02	05/18-05/31	05/17-05/30	05/15-05/28	05/20-06/02
23				05/27-06/09	05/25-06/07	05/24-06/06	05/22-06/04	05/27-06/09
24	06/01-06/14	05/31-06/13	06/04-06/17	06/03-06/16	06/01-06/14	05/31-06/13	05/29-06/11	06/03-06/16
25				06/10-06/23	06/08-06/21	06/07-06/20	06/05-06/18	06/10-06/23
26	06/15-06/28	06/14-06/27	06/18-07/01	06/17-06/30	06/15-06/28	06/14-06/27	06/12-06/25	06/17-06/30
27				06/24-07/07	06/22-07/05	06/21-07/04	06/19-07/02	06/24-07/07
28	06/29-07/12	06/28-07/11	07/02-07/15	07/01-07/14	06/29-07/12	06/28-07/11	06/26-07/09	07/01-07/14
29				07/08-07/21	07/06-07/19	07/05-07/18	07/03-07/16	07/08-07/21
30	07/13-07/26	07/12-07/25	07/16-07/29	07/15-07/28	07/13-07/26	07/12-07/25	07/10-07/23	07/15-07/28
31				07/22-08/04	07/20-08/02	07/19-08/01	07/17-07/30	07/22-08/04
32	07/27-08/09	07/26-08/08	07/30-08/12	07/29-08/11	07/27-08/09	07/26-08/08	07/24-08/06	07/29-08/11
33				08/05-08/18	08/03-08/16	08/02-08/15	07/31-08/13	08/05-08/18
34	08/10-08/23	08/09-08/22	08/13-08/26	08/12-08/25	08/10-08/23	08/09-08/22	08/07-08/20	08/12-08/25
35				08/19-09/01	08/17-08/30	08/16-08/29	08/14-08/27	08/19-09/01
36	08/24-09/06	08/23-09/05	08/27-09/09	08/26-09/08	08/24-09/06	08/23-09/05	08/21-09/03	08/26-09/08
37				09/02-09/15	08/31-09/13	08/30-09/12	08/28-09/10	09/02-09/15
38	09/07-09/20	09/06-09/19	09/10-09/23	09/09-09/22	09/07-09/20	09/06-09/19	09/04-09/17	09/09-09/22
39				09/16-09/29	09/14-09/27	09/13-09/26	09/11-09/24	09/16-09/29
40	09/21-10/04	09/20-10/03	09/24-10/07	9/23-10/06	09/21-10/04	09/20-10/03	09/18-10/01	09/23-10/06
41				09/30-10/13	09/28-10/11	09/27-10/10	09/25-10/08	09/30-10/13
42	10/05-10/18	10/04-10/17	10/08-10/21	10/07-10/20	10/05-10/18	10/04-10/17	10/02-10/15	10/07-10/20
43				10/14-10/27	10/12-10/25	10/11-10/24	10/09-10/22	10/14-10/27

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.

Available Years (Return to Standard Graphics Products)
NOAA-17:	2008	2007	2006	2005	2004
NOAA-16:	2003	2002	2001
NOAA-14:	1999	1998	1997	1996	1995

Growing Season Animations | National Crop Progress

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