This data set portrays the state and county boundaries of the US. The data set was created by extracting county polygon features from the individual 1:2,000,000-scale County boundary Digital Line Graph (DLG) files produced by the U.S. Geological Survey. These files were then merged into a single file. This data set was last revised in 2001.
These data are intended for geographic display and analysis at the national level, and for large regional areas. The data should be displayed and analyzed at scales appropriate for 1:2,000,000-scale data. For use with the GeoStac Database, this data set was compiled in order to simplify pesticide risk assesement and to provide a common data set for all stakeholders upon which to perform analysis.
The original source data set, available at http://www.nationalatlas.gov/mld/countyp.html, provides additional details as to the compilation process of the County Boundaries of the United States by the USGS.
ground condition
These data are intended for geographic display and analysis at the national level, and for large regional areas. The data should be displayed and analyzed at scales appropriate for 1:2,000,000-scale data.
897-B Harrison Street, S.E.
MS 561
National Atlas of the United States of America, The County Boundaries of the United States, 2001, is available at http://www.nationalatlas.gov/mld/countyp.html.
Not Available.
The data set was checked for topological consistency using the Arc/INFO command BUILD. No other checks for logical consistency were performed on this data set.
This data set includes county boundaries for United States of America. Data completeness generally reflects the content of the original DLG files.
Not Available.
Converted source County Boundaries of United States, 2001, data, available at http://www.nationalatlas.gov/mld/countyp.html, from shapefile format to geodatabase feature class format.
Projected County Boundary, 2001, geodatabase feature class to NAD 83 Albers Equal Area.
Imported and source edited metadata, which is available at: http://www.nationalatlas.gov/mld/countyp.html
Aggregate data based on the attributes, STATE, COUNTY, FIPS, STATE_FIPS, using the Geoprocessing Tool, DISSOLVE, in order to reduce duplicate data.
Dataset copied.
Internal feature number.
ESRI
The representation of the entity in the data.
National Atlas of the United States
Length of feature in internal units.
ESRI
Area of feature in internal units squared.
ESRI
The two-character abbreviation for the name of the State or State equivalent in which the county is located.
National Atlas of the United States
The name of the county or county equivalent.
National Atlas of the United States
The 5-digit FIPS code of the county or county equivalent. Codes ending in 000 indicate water areas for which a county designation is not reported.
National Atlas of the United States
The 2-digit FIPS code of the State or State equivalent.
National Atlas of the United States
1500 Research Parkway, Suite B223
None
Data can be downloaded from www.geostac.org with a registered user ID and password provided by the Spatial Sciences Laboratory
Data can be downloaded from www.geostac.org with a registered user ID and password provided by the Spatial Sciences Laboratory
897-B Harrison Street, S.E.