Description: These Layers are derived from the USDA NASS Cropland Data Layer (CDL). Each year's CDL was generalized using a zonal majority at the field level based on 2006 USDA common land unit (CLU) boundaries.
From the National Agricultural Statistics Service (NASS) website: "The Cropland Data Layer (CDL) contains crop specific digital data layers, suitable for use in geographic information systems (GIS) applications. The CDL Program annually focuses on producing digital categorized geo-referenced output products using imagery from the Resourcesat-1 AWiFS and the Landsat 5 TM satellites. See the Indian Government's National Remote Sensing Agency handbook for the Resourcesat-1 satellite. The CDL Program represents a cooperative venture between three USDA Agencies (Headquarters units of NASS, the Foreign Agriculture Service IPA group and the Farm Service Agency/Aerial Photography Field Office) plus in-state agreements between NASS Field Offices and their respective state government or university partners. Currently there are numerous historical research reports with more detailed information on NASS's general uses of remote sensing and GIS."
More at: http://www.nass.usda.gov/research/Cropland/SARS1a.htm
From the Farm Service Agency (FSA) website: "A Common Land Unit (CLU) is the smallest unit of land that has a permanent, contiguous boundary, a common land cover and land management, a common owner and a common producer in agricultural land associated with USDA farm programs. CLU boundaries are delineated from relatively permanent features such as fence lines, roads, and/or waterways."
More at: http://www.fsa.usda.gov/FSA/apfoapp?area=home&subject=prod&topic=clu
Copyright Text: Dana Peterson/Kansas Biological Survey; United States Department of Agriculture (USDA)
Description: Generalized CDL for 2009.
These Layers are derived from the USDA NASS Cropland Data Layer (CDL). Each year's CDL was generalized using a zonal majority at the field level based on 2006 USDA common land unit (CLU) boundaries.
From the National Agricultural Statistics Service (NASS) website: "The Cropland Data Layer (CDL) contains crop specific digital data layers, suitable for use in geographic information systems (GIS) applications. The CDL Program annually focuses on producing digital categorized geo-referenced output products using imagery from the Resourcesat-1 AWiFS and the Landsat 5 TM satellites. See the Indian Government's National Remote Sensing Agency handbook for the Resourcesat-1 satellite. The CDL Program represents a cooperative venture between three USDA Agencies (Headquarters units of NASS, the Foreign Agriculture Service IPA group and the Farm Service Agency/Aerial Photography Field Office) plus in-state agreements between NASS Field Offices and their respective state government or university partners. Currently there are numerous historical research reports with more detailed information on NASS's general uses of remote sensing and GIS."
More at: http://www.nass.usda.gov/research/Cropland/SARS1a.htm
From the Farm Service Agency (FSA) website: "A Common Land Unit (CLU) is the smallest unit of land that has a permanent, contiguous boundary, a common land cover and land management, a common owner and a common producer in agricultural land associated with USDA farm programs. CLU boundaries are delineated from relatively permanent features such as fence lines, roads, and/or waterways."
More at: http://www.fsa.usda.gov/FSA/apfoapp?area=home&subject=prod&topic=clu
Copyright Text: United States Department of Agriculture (USDA); Dana Peterson/Kansas Biological Survey
Description: Generalized CDL for 2008.
These Layers are derived from the USDA NASS Cropland Data Layer (CDL). Each year's CDL was generalized using a zonal majority at the field level based on 2006 USDA common land unit (CLU) boundaries.
From the National Agricultural Statistics Service (NASS) website: "The Cropland Data Layer (CDL) contains crop specific digital data layers, suitable for use in geographic information systems (GIS) applications. The CDL Program annually focuses on producing digital categorized geo-referenced output products using imagery from the Resourcesat-1 AWiFS and the Landsat 5 TM satellites. See the Indian Government's National Remote Sensing Agency handbook for the Resourcesat-1 satellite. The CDL Program represents a cooperative venture between three USDA Agencies (Headquarters units of NASS, the Foreign Agriculture Service IPA group and the Farm Service Agency/Aerial Photography Field Office) plus in-state agreements between NASS Field Offices and their respective state government or university partners. Currently there are numerous historical research reports with more detailed information on NASS's general uses of remote sensing and GIS."
More at: http://www.nass.usda.gov/research/Cropland/SARS1a.htm
From the Farm Service Agency (FSA) website: "A Common Land Unit (CLU) is the smallest unit of land that has a permanent, contiguous boundary, a common land cover and land management, a common owner and a common producer in agricultural land associated with USDA farm programs. CLU boundaries are delineated from relatively permanent features such as fence lines, roads, and/or waterways."
More at: http://www.fsa.usda.gov/FSA/apfoapp?area=home&subject=prod&topic=clu
Copyright Text: United States Department of Agriculture (USDA); Dana Peterson/Kansas Biological Survey
Description: Generalized CDL for 2007.
These Layers are derived from the USDA NASS Cropland Data Layer (CDL). Each year's CDL was generalized using a zonal majority at the field level based on 2006 USDA common land unit (CLU) boundaries.
From the National Agricultural Statistics Service (NASS) website: "The Cropland Data Layer (CDL) contains crop specific digital data layers, suitable for use in geographic information systems (GIS) applications. The CDL Program annually focuses on producing digital categorized geo-referenced output products using imagery from the Resourcesat-1 AWiFS and the Landsat 5 TM satellites. See the Indian Government's National Remote Sensing Agency handbook for the Resourcesat-1 satellite. The CDL Program represents a cooperative venture between three USDA Agencies (Headquarters units of NASS, the Foreign Agriculture Service IPA group and the Farm Service Agency/Aerial Photography Field Office) plus in-state agreements between NASS Field Offices and their respective state government or university partners. Currently there are numerous historical research reports with more detailed information on NASS's general uses of remote sensing and GIS."
More at: http://www.nass.usda.gov/research/Cropland/SARS1a.htm
From the Farm Service Agency (FSA) website: "A Common Land Unit (CLU) is the smallest unit of land that has a permanent, contiguous boundary, a common land cover and land management, a common owner and a common producer in agricultural land associated with USDA farm programs. CLU boundaries are delineated from relatively permanent features such as fence lines, roads, and/or waterways."
More at: http://www.fsa.usda.gov/FSA/apfoapp?area=home&subject=prod&topic=clu
Copyright Text: United States Department of Agriculture (USDA); Dana Peterson/Kansas Biological Survey
Description: Generalized CDL for 2006.
These Layers are derived from the USDA NASS Cropland Data Layer (CDL). Each year's CDL was generalized using a zonal majority at the field level based on 2006 USDA common land unit (CLU) boundaries.
From the National Agricultural Statistics Service (NASS) website: "The Cropland Data Layer (CDL) contains crop specific digital data layers, suitable for use in geographic information systems (GIS) applications. The CDL Program annually focuses on producing digital categorized geo-referenced output products using imagery from the Resourcesat-1 AWiFS and the Landsat 5 TM satellites. See the Indian Government's National Remote Sensing Agency handbook for the Resourcesat-1 satellite. The CDL Program represents a cooperative venture between three USDA Agencies (Headquarters units of NASS, the Foreign Agriculture Service IPA group and the Farm Service Agency/Aerial Photography Field Office) plus in-state agreements between NASS Field Offices and their respective state government or university partners. Currently there are numerous historical research reports with more detailed information on NASS's general uses of remote sensing and GIS."
More at: http://www.nass.usda.gov/research/Cropland/SARS1a.htm
From the Farm Service Agency (FSA) website: "A Common Land Unit (CLU) is the smallest unit of land that has a permanent, contiguous boundary, a common land cover and land management, a common owner and a common producer in agricultural land associated with USDA farm programs. CLU boundaries are delineated from relatively permanent features such as fence lines, roads, and/or waterways."
More at: http://www.fsa.usda.gov/FSA/apfoapp?area=home&subject=prod&topic=clu
Copyright Text: United States Department of Agriculture (USDA); Dana Peterson/Kansas Biological Survey
Description: This coverage contains the Zip Codes classified by Majority coverage of Major Land Resource Area (MLRA) boundaries for the conterminous United States. MLRA boundaries were revised in the mid-1990s from earlier versions established in the 1970s and 1980s by the U.S. Department of Agriculture (USDA) Natural Resources Conservation Service (NRCS), formerly the Soil Conservation Service (SCS). The revised MLRA boundary coverage was digitized at the Soil Survey Center in Lincoln, Nebraska, the most recent version of which was completed in January of 1997. Buffer polygons were added to the U.S. national boundaries and shoreline by NRCS National Cartography and Geospatial Center in Fort Worth, Texas, for use with NRCS National Resources Inventory (NRI) digitized sample sites. These buffered boundaries were later removed by the NRCS National Headquarters office, Resources Inventory and Assessment Division (RAD) in May 2000, and the national shoreline and outer boundaries were made to conform to standard boundaries established for NRI Map Room series maps (http://www.nrcs.usda.gov/technical/land/). Those standard U.S. national boundaries and shoreline are based on 1:2,000,000 scale 8-digit hydrologic unit coverage obtained from the U.S. Geological Survey, circa 1990, and were edited by the National Center for Resource Innovations (NCRI) in Washington, DC, and subsequently by NRCS/NHQ/RAD.
More information at: http://www.nrcs.usda.gov/technical/NRI/maps/aboutmaps/us48mlra.html