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1. County Boundary (Polygon): Sacramento County, California, 2015

2015. Sacramento County GIS. This polygon shapefile depicts the county boundary for Sacramento County, California. This layer is part of a collection of data originally produce... Sacramento County GIS.

2. California Counties: Air Resources Board, 2004

2004. Stephen P. Teale Data Center (Calif.). and California Air Resources Board. Planning and Technical Support Division. This polygon shapefile California represents the California county boundaries at moderate spatial resolution, aligned to match well with the ARB Ca... California. Air Resources Board.

3. Coastal Counties, California, 2000

2000. California. Department of Fish and Game. Marine Resources Region. This polygon shapefile represents the 15 coastal counties in California. These counties were extracted from the Counties, California 2000 (county24... California. Department of Fish and Game. Marine Resources Region.

4. Counties, California, 2000

2000. California. Department of Fish and Game. Marine Resources Region. This polygon shapefile represents counties in California. These boundaries were created by digitized 24K quad base maps. This layer is part of a co... California. Department of Fish and Game. Marine Resources Region.

5. Counties, California, 2000

2000. California. Metropolitan Transportation Commission. This polygon shapefile contains the boundaries of the 58 counties in California as of 2000. These data were derived from the TIGER/2000 Census data... California. Metropolitan Transportation Commission.

6. Historical United States County Boundaries, 1990

1990. Earle, Carville, Heppen, John, Louisiana State University (Baton Rouge, La.). Department of Geography and Anthropology., Otterstrom, Samuel, and Cao, Changyong. This polygon shapefile contains county boundaries for the United States in 1990. Attributes include county and state names as well as FIPS identifi... Geoscience Publications.

7. Historical United States County Boundaries, 1980

1980. Earle, Carville, Heppen, John, Louisiana State University (Baton Rouge, La.). Department of Geography and Anthropology., Otterstrom, Samuel, and Cao, Changyong. This polygon shapefile contains county boundaries for the United States in 1980. Attributes include county and state names as well as FIPS identifi... Geoscience Publications.

8. Historical United States County Boundaries, 1970

1970. Earle, Carville, Heppen, John, Louisiana State University (Baton Rouge, La.). Department of Geography and Anthropology., Otterstrom, Samuel, and Cao, Changyong. This polygon shapefile contains county boundaries for the United States in 1970. Attributes include county and state names as well as FIPS identifi... Geoscience Publications.

9. Historical United States County Boundaries, 1960

1960. Earle, Carville, Heppen, John, Louisiana State University (Baton Rouge, La.). Department of Geography and Anthropology., Otterstrom, Samuel, and Cao, Changyong. This polygon shapefile contains county boundaries for the United States in 1960. Attributes include county and state names as well as FIPS identifi... Geoscience Publications.

10. Historical United States County Boundaries, 1950

1950. Earle, Carville, Heppen, John, Louisiana State University (Baton Rouge, La.). Department of Geography and Anthropology., Otterstrom, Samuel, and Cao, Changyong. This polygon shapefile contains county boundaries for the United States in 1950. Attributes include county and state names as well as FIPS identifi... Geoscience Publications.