Because the Illinois 2007 CDL is a marked departure from previous NASS CDL data products, remote sensing scientists from the Illinois State Geological Survey, the Illinois Natural History Survey, and USDA NASS conducted a formal accuracy assessment of the Illinois 2007 CDL land cover data product. The results of the statistical analyses are contained in the project report (see below).�� The statistical analysis determined that certain land cover categories from the original Illinois 2007 NASS CDL data product should be aggregated. ISGS and INHS scientists created a revised version of the CDL data product and also applied a color-coding scheme similar to that for the 1999-2000 Illinois Land Cover data product.
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