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Socioeconomic Features of Alabama

Data Dictionary

County Boundaries

• Description: This data set consists of the county boundaries of the conterminous U.S. More detailed information can be found in the metadata file.
• : Nationwide
• Date: 1994
• Format: ArcView Shapefile
• File Size: Unknown
• Source: USGS digital line graphic (DLG) data
• Link: EPA BASINS

Elevations (DEM)

• Description: This data set consists of source elevations for the conterminous U.S. More detailed information can be found in the metadata file.
• : Nationwide
• Date: 1979-1990
• Format: ArcView Shapefile
• File Size: Unknown
• Source: USGS DEM raster files
• Link: EPA BASINS

EPA Regional Boundaries

• Description: This data set consists of boundaries of the 10 regional offices of the U.S. EPA in the conterminous U.S. More detailed information can be found in the metadata file.
• : Nationwide
• Date: 1994
• Format: ArcView Shapefile
• File Size: Unknown
• Source: USGS State Boundaries, derived from DLG's
• Link: EPA BASINS

Federal and Indian Lands

• Description: This data set consists of the boundaries of all types of managed areas existing in the conterminous U.S., including lands held by Federal, State, tribal, and private agencies and organizations. More detailed information can be found in the metadata file.
• : Nationwide
• Date: Unknown
• Format: ArcView Shapefile
• File Size: Unknown
• Source: U.S. Fish and Wildlife Service GAP Program
• Link: EPA BASINS

Major Roads

• Description: This data set consists of the nation's principal arterial highway system and other National Highway System routes. More detailed information can be found in the metadata file.
• : Nationwide
• Date: 1992-1996
• Format: ArcView Shapefile
• File Size: Unknown
• Source: National Highway Planning network's comprehensive database
• Link: EPA BASINS

Populated Place Locations

• Description: This data set consists of locations of populated places are represented on USGS topographic maps. More detailed information can be found in the metadata file.
• : Nationwide
• Date: 1989-1994
• Format: ArcView Shapefile
• File Size: Unknown
• Source: USGS 1:24,000 Topographic maps and USGS Geographic Name Information System II (GNISII) Topographic names data.
• Link: EPA BASINS

State Boundaries

• Description: This data set consists of the states boundaries of the conterminous U.S. More detailed information can be found in the metadata file.
• : Nationwide
• Date: 1994
• Format: ArcView Shapefile
• File Size: Unknown
• Source: USGS DLGs
• Link: EPA BASINS

Urbanized Areas

• Description: This data set consists of boundaries of the census defined urbanized areas. More detailed information can be found in the metadata file.
• : Nationwide
• Date: 1990
• Format: ArcView Shapefile
• File Size: Unknown
• Source: U.S. Bureau of Census urbanized area limit database.
• Link: EPA BASINS