National Geospatial Management Center
The National Geospatial Management Center (NGMC) has long been respected for the quality of maps it produces to support various Natural Resource Conservation Service projects and programs. In addition to producing maps, NGMC is a major distributor of geospatial data to support National, State and local field needs.
The link address is: http://www.nrcs.usda.gov/wps/portal/nrcs/main/national/ngmc