NASS Releases New Geospatial Data Products

New Satellite Images Show Ag Land Cover for 2009 Crop Year

WASHINGTON, — Feburary 01, 2010 — The U.S. Department of Agriculture's National Agricultural Statistics Service (NASS) today announced the release of new satellite images depicting agricultural land cover across most of the nation for the 2009 crop year. The images, referred to as cropland data layers (CDL), are a useful tool for monitoring crop rotation patterns, land use changes, water resources and carbon emissions.

These crop-specific, digital data layers are suitable for use in geographic information systems (GIS) applications. They can be used by agribusinesses, farmers, government agencies, researchers and academic institutions to study pesticide risk, epidemiology, transportation, fertilizer usage, carbon dioxide flux and other topics.

NASS produced the CDLs using satellite images observed at 56-meter (0.775 acres per pixel) resolution and collected from the Resourcesat-1 Advanced Wide Field Sensor (AWiFS), Landsat Thematic Mapper and Moderate Resolution Imaging Spectroradiometer (MODIS). The collection of images was then categorized using on-the-ground farm information including field location, crop type, land cover, elevation, tree canopy and urban infrastructure.

For the first time, the CDL images are available for 47 of the 48 contiguous states. Data for the final state, Florida, will be available this spring pending the availability of certified farm data required to produce the images. NASS is also making available, for the first time, the New Mexico CDL for 2008.

The entire inventory of CDL products, including metadata and accuracy assessments, is available online at the USDA Natural Resources Conservation Service's Geospatial Data Gateway: http://datagateway.nrcs.usda.gov and at this NASS website: http://www.nass.usda.gov/research/Cropland/SARS1a.htm .

USDA is an equal opportunity provider, employer and lender. To file a complaint of discrimination, write: USDA, Director, Office of Civil Rights, 1400 Independence Ave., S.W., Washington, D.C. 20250-9410 or call (800) 795-3272 (voice), or (202) 720-6382 (TDD).



Contact:


Audra Zakzeski
Tel.: 703-877-8000 Ext. 121




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