2009 Illinois Cropland
Data Layer Information (CDL)
This 2009 Illinois Cropland
Data Layer Atlas was constructed from 2009 categorized
Resourcesat-1 AWiFS imagery courtesy of USDA Foreign
Agricultural Service, Landsat 5 Thematic Mapper and
Landsat 7 Enhanced Thematic Mapper Plus. The ground
truth for this product utilized the Farm Service Agency
Common Land Unit for crops classes, and 2001 National
Land Cover Dataset (NLCD) for non-agricultural classes.
Ancillary data included: NLCD Impervious Surface,
NLCD Forest Canopy, National Elevation Dataset, and
Moderate Resolution Imagery Spectroradiometer (MODIS)
16 day Normalized Difference Vegetation Index (NDVI)
composite. The Cropland Data Layer (CDL) was produced
using Rulequest See5 and ERDAS Imagine.
The CDL of Illinois has been created annually since
crop year 1999 and this product makes temporal analysis
between years possible to determine such trends as
crop rotation, urban expansion and crop acreage variability.
The CDL Atlas was created using ArcGIS software from
the Environmental System Research Institute, with
each page containing a separate Illinois county.
To view the CDL Atlas, click on a county on the map
to the left, or select from the list of Illinois counties
below.
For more details, please visit:
http://www.nass.usda.gov/research/Cropland/metadata/meta.htm
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