USDA, National Agricultural Statistics Service Cropland Data Layer DVD
Directory Structure, File Names and File Descriptions
The root of the DVD contains the following files and directories:
readme.txt: This document in text format.
readme.htm: This document in HTM format.
NASS_XX: A directory for each state named "NASS_XX" where XX represents the two letter state abbreviation.
Within each state directory there are the following files (where XX represents the two letter state abbreviation, YYYY, and ZZ represents the UTM Zone):
cdl_awifs_r_XX_YYYY_albers.aux: Associated Cropland Data Layer GEOTIFF file in an Albers Conical Equal Area projection.
cdl_awifs_r_XX_YYYY_albers.tfw: Associated Cropland Data Layer GEOTIFF Worldfile in an Albers Conical Equal Area projection.
cdl_awifs_r_XX_ YYYY _albers.tif: Cropland Data Layer GEOTIFF file in an Albers Conical Equal Area projection.
cdl_awifs_r_XX_ YYYY _albers_confidence.aux: Associated Confidence Layer GEOTIFF file in an Albers Conical Equal Area projection.
cdl_awifs_r_XX_ YYYY _albers_confidence.tfw: Associated Confidence Layer GEOTIFF Worldfile in an Albers Conical Equal Area projection.
cdl_awifs_r_XX_ YYYY _albers_confidence.tif: Confidence Layer GEOTIFF file in an Albers Conical Equal Area projection.
cdl_awifs_r_XX_ YYYY _utmZZ.aux: Associated Cropland Data Layer GEOTIFF file in an Universal Transverse Mercator projection.
cdl_awifs_r_XX_ YYYY _utmZZ.tfw: Associated Cropland Data Layer GEOTIFF Worldfile in an Universal Transverse Mercator projection.
cdl_awifs_r_XX_ YYYY _utmZZ.tif: Cropland Data Layer GEOTIFF file in an Universal Transverse Mercator projection.
cdl_meta_r_XX_ YYYY.htm: Metadata in HTM format.
cdllegend_r_XX_YYYY.jpg: Legend containing the standard names and colors in a JPEG file format.
XXYY_img_file_formats.zip: Winzip file containing the above data in an ERDAS Imagine file format (.img) with associated pyramid layers (.rrd).
*Special note on Oklahoma 2006 (Version2, released March 6, 2008): An updated version of the 2006 Oklahoma Cropland Data Layer is included in the NASS_OK directory. The data files have the same naming convention as above with the exception of adding “_version2” to the end of the file name. See the associated metadata file in the same directory for additional details.
Attribute values, projection parameters and processing details can be found in the associated metadata files. Additional information is available at the official Cropland Data Layer website at http://www.nass.usda.gov/research/Cropland/SARS1a.htm.
Technical contact information:
USDA, National Agricultural Statistics Service
Spatial Analysis Research Section
3251 Old Lee Highway, Room 305
Fairfax, VA 22030-1504
telephone: 703-877-8000
fax: 703-877-8044
email: HQ_RD_GIB@nass.usda.gov
Disclaimer: Users of the Cropland Data Layer are solely responsible for interpretations made from these products. The USDA, NASS does not warrant results you may obtain by using the Cropland Data Layer.