GeoData @ UCB

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1. Census Blocks, 1990 - District of Columbia

1990. U.S. Department of Commerce, Bureau of the Census, Geography Division. The polygons in this datalayer represent U.S. Census Blocks for the entire District of Columbia. Census blocks are areas bounded on all sides by v... U.S. Department of Commerce, Bureau of the Census.

2. Census Counties, 1990 - District of Columbia

1990. U.S. Department of Commerce, Bureau of the Census, Geography Division. This datalayer displays the counties for the state, based on a ground condition of January 1, 1990. The primary legal divisions of most states are ... U.S. Department of Commerce, Bureau of the Census, Geography Division.

3. Census Place, 1990 - District of Columbia

1990. U.S. Department of Commerce, Bureau of the Census, Geography Division. This datalayer displays the Census Places for the District of Columbia based on the ground condition of January 1, 1990. Places, for the reporting ... U.S. Department of Commerce, Bureau of the Census.

4. Census Tracts, 1990 - District of Columbia

1990. U.S. Department of Commerce, Bureau of the Census, Geography Division. This datalayer displays Census Tracts for the District of Columbia, 1990. Census tracts are small, relatively permanent statistical subdivisions of... U.S. Department of Commerce, Bureau of the Census.

5. Census Voting Districts, 1990 - District of Columbia

1990. U.S. Department of Commerce, Bureau of the Census, Geography Division. This datalayer displays the Voting Districts for the District of Columbia for 1990. A Voting District (VTD) is the generic name for a variety of ge... U.S. Department of Commerce, Bureau of the Census.

6. 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.).

7. Nonattainment Areas for Carbon Monoxide Pollution: United States and Territories, 1990

1990. United States. Bureau of Transportation Statistics and Stackhouse, Cecil. This polygon shapefile depicts nonattainment and maintenance areas for the United States and its Territories for the enforcement of the carbon mono... United States. Bureau of Transportation Statistics.

8. Nonattainment Areas for Nitrogen Dioxide Pollution: United States and Territories, 1990

1990. United States. Bureau of Transportation Statistics and Stackhouse, Cecil. This polygon shapefile depicts nonattainment and maintenance areas for the United States and its Territories for the enforcement of the nitrogen di... United States. Bureau of Transportation Statistics.

9. Nonattainment Areas for Ozone Pollution: United States and Territories, 1990

1990. United States. Bureau of Transportation Statistics and Stackhouse, Cecil. This polygon shapefile depicts nonattainment and maintenance areas for the United States and its Territories for the enforcement of the ozone (O3)1... United States. Bureau of Transportation Statistics.

10. Nonattainment Areas for Patriculate Matter Pollution: United States and Territories, 1990

1990. United States. Bureau of Transportation Statistics and Stackhouse, Cecil. This polygon shapefile depicts nonattainment and maintenance areas for the United States and its Territories for the enforcement of the particulate... United States. Bureau of Transportation Statistics.

11. Spread of Africanized Honey Bees in the United States, 1990-2005

1990. United States. Agricultural Research Service. This polygon shapefile portrays the spread, by year, of the Africanized honey bee (AHB) in the United States, Puerto Rico, and the U.S. Virgin Isla... National Atlas of the United States.

12. UA Census Block Groups, 1990 - District of Columbia

1990. U.S. Department of Commerce, Bureau of the Census, Geography Division. The polygons represent U.S. Census Block Groups for the District based on the ground condition of January 1, 1990. Block Groups (BGs) are clusters ... U.S. Department of Commerce, Bureau of the Census.

13. UA Census Blocks, 1990 - District of Columbia

1990. U.S. Department of Commerce, Bureau of the Census, Geography Division. The polygons in this datalayer represent U.S. Census Blocks for the district. Census blocks are statistical areas bounded on all sides by visible f... U.S. Department of Commerce, Bureau of the Census.

14. UA Census Counties, 1990 - District of Columbia

1990. U.S. Department of Commerce, Bureau of the Census, Geography Division. This datalayer displays the counties for the District, based on a ground condition of January 1, 1990. The primary legal divisions of most states a... U.S. Department of Commerce, Bureau of the Census, Geography Division.

15. UA Census County Subdivisions, 1990 - District of Columbia

1990. U.S. Department of Commerce, Bureau of the Census, Geography Division. This datalayer displays County Subdivisions (Minor Civil Divisions) for the District, based on legal and statistical entities established on Januar... U.S. Department of Commerce, Bureau of the Census, Geography Division.

16. UA Census Places, 1990 - District of Columbia

1990. U.S. Department of Commerce, Bureau of the Census, Geography Division. This datalayer displays the Census Places for the District based on the ground condition of January 1, 1990. Places, for the reporting of decennial... U.S. Department of Commerce, Bureau of the Census.

17. UA Census Tracts, 1990 - District of Columbia

1990. U.S. Department of Commerce, Bureau of the Census, Geography Division. This datalayer displays Census Tracts for the District, based on entity boundaries established on January 1, 1990. Census tracts are small, relati... U.S. Department of Commerce, Bureau of the Census.

18. UA Census Urbanized Areas, 1990 - District of Columbia

1990. U.S. Department of Commerce, Bureau of the Census, Geography Division. This datalayer displays the Urbanized Areas (UAs) for the District based on a January 1, 1990 ground condition. Note that the Census Bureau made si... U.S. Department of Commerce, Bureau of the Census.