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1. Federal Lands of the United States, 2006

1972. National Atlas of the United States. This polygon shapefile contains federally owned or administered lands of the United States, Puerto Rico, and the U.S. Virgin Islands. Only areas of... National Atlas of the United States.

2. Grazing Lands in Watersheds: San Francisco Bay Area, California, 2009

2009. Bay Area Open Space Council, Conservation Lands Network, San Francisco Bay Area Upland Habitat Goals Project, and GreenInfo Network (Firm). This polygon shapefile depicts a watershed integrity cluster analysis at the CalWater 2.2.1 Planning Watershed (PWS) level was performed by mapping... Bay Area Open Space Council.

3. Historical Aerial Photography: Illinois, 1937-1947

1936. Illinois State Geological Survey. The primary data set consists of historical black and white aerial photographs from Illinois acquired during 1936 to 1941. Alternative years of pho...

4. Land Cover of Alluvial Areas: Russian River Main Stem, Alexander Valley Reach, Sonoma County, California, 1942

1942. Circuit Rider Productions. This polygon shapefile describes the landuse and landcover of the Alexander Valley reach of the Russian River in 1942. The Alexander Valley Reach e... Circuit Rider Productions.

5. Land Use: San Francisco Bay Area, California, 2008

2008. Bay Area Open Space Council, Conservation Lands Network, San Francisco Bay Area Upland Habitat Goals Project, and GreenInfo Network (Firm). This polygon shapefile depicts land use for the nine county San Francisco Bay Area Region, California, originlly derived from the California Depart... Bay Area Open Space Council.

6. Prime Farmlands of the Chesapeake Bay Watershed Region

2000. Shapefile and raster layers paired with STATSGO data from NRCS to determine prime farmland within the Chesapeake Bay watershed. MORE INFORMATION - ...

7. Ten-digit Watershed Boundaries: Indiana

2011. United States Department of Agriculture. The following is extracted from USDA, NRCS metadata -- "This data set is a complete digital hydrologic unit boundary layer to the Watershed (10-di...

8. Twelve-digit Subwatershed Boundaries: Indiana

2011. United States Department of Agriculture. The following is extracted from USDA, NRCS metadata -- "This data set, part of the Watershed Boundary data set (WBD), is a complete digital hydrol...