Revisions The coverage was last updated in 2002. Reviews_Applied_to_Data This coverage has received no formal review. Related_Spatial_and_Tabular_Data_Sets This MLRA coverage is intended to have the same shoreline and outer boundaries as other coverages available in the NRCS State of the Land series (available online at <http://www.nrcs.usda.gov/technical/land/>), although their precise correspondance has not been thoroughly verified. These coverages include counties, 8-digit hydrologic units, and Federal lands, derived from USGS coverages, circa 1990. References_Cited NRCS National Headquarters, Resource Assessment Division (RAD). See USDA Agriculture Handbook 296 "Land Resource Regions and Major Resource Areas of the United States" for a look at an earlier version of the map and an explanation of MLRA and LRR designations.
Kevin Grantham, USDA/NRCS National Cartographic and Geospatial Center added buffer polygons to the U.S. national boundaries.
Dean Oman (email@example.com), USDA/NRCS National Headquaters, Resource Assessment Division, replaced the U.S. national shoreline and outer boundaries (including buffer polygons added by Kevin Grantham) with boundaries established for State of the Land series maps. (<http://www.nrcs.usda.gov/technical/land/>)
George Muehlbach, National Center for Resource Innovations (NCRI), Washington, DC, made the initial shoreline and national boundary adjustments to the 1:2,000,000 scale coverages obtained from the United States Geological Survey, which also serve as the shoreline and outer national boundaries for this MLRA coverage.