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11. Counties: Russian River Watershed, California, 1990

1990. Circuit Rider Productions. This polygon dataset contains county boundaries and features (usually shorelines). The county outlines were digitized from 1:100,000 scale mylar US... Circuit Rider Productions.

12. Counties: San Francisco Bay Area and Santa Cruz County, California, 2010

2010. Bay Area Open Space Council, Conservation Lands Network, San Francisco Bay Area Upland Habitat Goals Project, and GreenInfo Network (Firm). This polygon file depicts boundaries of the nine counties in the San Francisco Bay Area Region, California. The Bay Area Open Space Council officia... Bay Area Open Space Council.

13. Counties: San Francisco Bay Area, California, 2010

2010. Bay Area Open Space Council, Conservation Lands Network, San Francisco Bay Area Upland Habitat Goals Project, and GreenInfo Network (Firm). This polygon shapefile depicts the nine counties of the San Francisco Bay Area Region in California. This data was derived from the United States C... Bay Area Open Space Council.

14. County Boundaries of the United States, 1980

1980. Geological Survey (U.S.). This polygon shapefile contains the 1980 state and county boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer ... Geological Survey (U.S.).

15. County Boundaries of the United States, 1990

1990. Geological Survey (U.S.). This polygon shapefile portrays the 1990 state and county boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer ... Geological Survey (U.S.).

16. County Boundaries of the United States, 2000

2000. Geological Survey (U.S.). This polygon shapefile portrays the 2000 state and county boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer ... Geological Survey (U.S.).

17. County Boundaries: Uganda, 2006

2006. Uganda Bureau of Statistics. This polygon shapefile represents the county boundaries for Uganda. These are the Level 4 admininstrative boundaries (ADM4). This layer is based on... Uganda Bureau of Statistics.

18. County Boundaries with Politicial Limit: United States and Territories, 2014

2014. United States. Bureau of Transportation Statistics. This polygon shapefile contains United States county boundaries with political limits extracted from the U.S. Census Bureau's MAF/TIGER Database (M... United States. Bureau of Transportation Statistics.

19. County Boundary (Line): Santa Clara County, California, 2015

2015. Santa Clara County (Calif.). Planning Office. This polyline shapefile depicts the administrative boundary for the County of Santa Clara, California. This layer is part of a collection of GIS da... Santa Clara County (Calif.). Planning Office.

20. County Boundary (Line): Solano County, California, 2015

2015. Armstrong, Jake H. This line shapefile depicts the county boundary for Solano County, California, including identification of neighboring counties. This layer is part... Solano County Department of Information Technology.