Metadata: Identification_Information: Citation: Citation_Information: Originator: National Atlas of the United States Publication_Date: 201207 Title: 1:1,000,000-Scale County Boundaries of the United States Publication_Information: Publication_Place: Rolla, MO Publisher: National Atlas of the United States Online_Linkage: Description: Abstract: This map layer portrays the county boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer was created by extracting county polygon features from the CENSUS 2006 TIGER/Line files produced by the U.S. Census Bureau. These files were then merged into a single file. Purpose: 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 1:1,000,000-scale data. No responsibility is assumed by the National Atlas of the United States in the use of these data. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 201207 Currentness_Reference: Publication date Status: Progress: Complete Maintenance_and_Update_Frequency: Irregular Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: 170 East_Bounding_Coordinate: -64 North_Bounding_Coordinate: 72 South_Bounding_Coordinate: 17 Keywords: Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: Boundaries Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Counties Theme_Keyword: County boundaries Place: Place_Keyword_Thesaurus: U.S. Department of Commerce; 1995; Countries, Dependencies, Areas of Special Sovereignty, and Their Principal Administrative Divisions Federal Information Processing Standard (FIPS) 10-4; Washington, DC; National Institute of Standards and Technology. Place_Keyword: United States Place: Place_Keyword_Thesaurus: None Place_Keyword: US Place_Keyword: USA Place: Place_Keyword_Thesaurus: U.S. Department of Commerce; 1987; Codes for the Identification of the States, the District of Columbia and the Outlying Areas of The United States, and Associated Areas; FIPS 5-2; Washington, DC; National Institute of Standards and Technology. Place_Keyword: Alabama Place_Keyword: Alaska Place_Keyword: Arizona Place_Keyword: Arkansas Place_Keyword: California Place_Keyword: Colorado Place_Keyword: Connecticut Place_Keyword: Delaware Place_Keyword: District of Columbia Place_Keyword: Florida Place_Keyword: Georgia Place_Keyword: Hawaii Place_Keyword: Idaho Place_Keyword: Illinois Place_Keyword: Indiana Place_Keyword: Iowa Place_Keyword: Kansas Place_Keyword: Kentucky Place_Keyword: Louisiana Place_Keyword: Maine Place_Keyword: Maryland Place_Keyword: Massachusetts Place_Keyword: Michigan Place_Keyword: Minnesota Place_Keyword: Mississippi Place_Keyword: Missouri Place_Keyword: Montana Place_Keyword: Nebraska Place_Keyword: Nevada Place_Keyword: New Hampshire Place_Keyword: New Jersey Place_Keyword: New Mexico Place_Keyword: New York Place_Keyword: North Carolina Place_Keyword: North Dakota Place_Keyword: Ohio Place_Keyword: Oklahoma Place_Keyword: Oregon Place_Keyword: Pennsylvania Place_Keyword: Rhode Island Place_Keyword: South Carolina Place_Keyword: South Dakota Place_Keyword: Tennessee Place_Keyword: Texas Place_Keyword: Utah Place_Keyword: Vermont Place_Keyword: Virginia Place_Keyword: Washington Place_Keyword: West Virginia Place_Keyword: Wisconsin Place_Keyword: Wyoming Place_Keyword: Puerto Rico Place_Keyword: Virgin Islands Place_Keyword: U.S. Virgin Islands Access_Constraints: None Use_Constraints: None. Acknowledgment of The National Atlas of the United States of America would be appreciated in products derived from these data. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: National Atlas of the United States Contact_Address: Address_Type: Mailing and physical address Address: U.S. Geological Survey Address: 511 National Center Address: 12201 Sunrise Valley Drive City: Reston State_or_Province: VA Postal_Code: 20192 Contact_Voice_Telephone: 1-888-ASK-USGS (1-888-275-8747) Contact_Electronic_Mail_Address: atlasmail@usgs.gov Data_Quality_Information: Logical_Consistency_Report: The map layer was checked for topological consistency using ArcGIS. No other checks for logical consistency were performed on this map layer. Completeness_Report: This map layer includes county boundaries for all 50 States, Puerto Rico, and the U.S. Virgin Islands. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: U.S. Census Bureau Publication_Date: 2007 Title: 2006 Second Edition TIGER/Line files - Boundaries Type_of_Source_Media: Online Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2007 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: Bound-Cen06 Source_Contribution: Spatial and attribute information Source_Information: Source_Citation: Citation_Information: Originator: National Atlas of the United States Publication_Date: Unknown Title: 1:1,000,000-Scale National Atlas map layers and other quality control files Other_Citation_Details: Numerous sources were used to perform quality-control and vertical integration, including all the 1:1,000,000-scale National Atlas map layers, a variety of online sources, and online USGS topographic maps. More information is available from the National Atlas contacts listed elsewhere in this metadata. Type_of_Source_Media: Variable Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: Unknown Source_Currentness_Reference: Variable Source_Citation_Abbreviation: QC Source_Contribution: Spatial information Process_Step: Process_Description: The 1:1,000,000-scale county boundaries were derived from U.S. Census TIGER/Line (Topologically Integrated Geographic Encoding and Reference system) data. The TIGER files were merged and generalized. Source_Used_Citation_Abbreviation: Bound_Cen06 Process_Date: 2007 Process_Step: Process_Description: The file was projected to an Albers Equal-Area projection, a field was added for square miles and the values calculated using ArcMap, and the file was converted back to geographic coordinates. Process_Date: 2012 Process_Step: Process_Description: All the 1:1,000,000-scale map layers were checked for vertical integration. Line positions were adjusted as necessary to remove overlaps. Wherever possible, linear features were separated by 300 meters, but were kept within 500 meters of their true location. Source_Used_Citation_Abbreviation: QC Process_Date: 2012 Spatial_Data_Organization_Information: Indirect_Spatial_Reference: U.S. Department of Commerce; 1987; Codes for the Identification of the States, the District of Columbia and the Outlying Areas of the United States, and Associated Areas; FIPS 5-2; Washington, DC; National Institute of Standards and Technology. U.S. Department of Commerce; 1990; Counties and Equivalent Entities of the United States, Its Possessions, and Associated Areas; FIPS 6-4; Washington, DC; National Institute of Standards and Technology. Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: G-Polygon Point_and_Vector_Object_Count: 3641 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.000278 Longitude_Resolution: 0.000278 Geographic_Coordinate_Units: Decimal degrees Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: GRS1980 Semi-major_Axis: 6378137 Denominator_of_Flattening_Ratio: 298.257222 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: County Entity_Type_Definition: The second order division of a nation, such as a parish, borough, municipio, judicial division, or independent cities in Maryland, Missouri, Nevada, and Virginia. Entity_Type_Definition_Source: National Atlas of the United States Attribute: Attribute_Label: Shape Attribute_Definition: The representation of the entity in the data. Attribute_Definition_Source: National Atlas of the United States Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Polygon Enumerated_Domain_Value_Definition: 2-dimensional element Enumerated_Domain_Value_Definition_Source: ESRI GIS software Attribute: Attribute_Label: Area Attribute_Definition: The size of the shape in coverage units. In the distributed file, coverage units represent square decimal degrees. Attribute_Definition_Source: National Atlas of the United States Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.00000401794 Range_Domain_Maximum: 74.22827978950 Attribute: Attribute_Label: Perimeter Attribute_Definition: The perimeter of the shape in coverage units. In the distributed file, coverage units represent decimal degrees. Attribute_Definition_Source: National Atlas of the United States Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.00897449042 Range_Domain_Maximum: 107.629698480000 Attribute: Attribute_Label: Countyp010 Attribute_Definition: Internal feature number. Attribute_Definition_Source: National Atlas of the United States Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 3642 Attribute: Attribute_Label: State Attribute_Definition: The two-character abbreviation for the name of the State or State equivalent in which the county is located. Attribute_Definition_Source: National Atlas of the United States Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Codes for the Identification of the States, the District of Columbia and the Outlying Areas of the United States, and Associated Areas; Federal Information Processing Standard (FIPS) 5-2. Codeset_Source: U.S. Department of Commerce Attribute: Attribute_Label: County Attribute_Definition: The name of the county or county equivalent. Attribute_Definition_Source: National Atlas of the United States Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Counties and Equivalent Entities of the United States, Its Possessions, and Associated Areas; FIPS 6-4. Codeset_Source: U.S. Department of Commerce Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Enumerated_Domain_Value_Definition: Water areas of the United States for which a county designation is not reported. Enumerated_Domain_Value_Definition_Source: National Atlas of the United States Attribute: Attribute_Label: Fips Attribute_Definition: 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. Attribute_Definition_Source: National Atlas of the United States Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Counties and Equivalent Entities of the United States, Its Possessions, and Associated Areas; FIPS 6-4 Codeset_Source: U.S. Department of Commerce Attribute: Attribute_Label: State_fips Attribute_Definition: The 2-digit FIPS code of the State or State equivalent. Attribute_Definition_Source: National Atlas of the United States Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Codes for the Identification of the States, the District of Columbia and the Outlying Areas of the United States, and Associated Areas; FIPS 5-2. Codeset_Source: U.S. Department of Commerce Attribute: Attribute_Label: Square_mil Attribute_Definition: The size of the county or county equivalent in square miles. The value was calculated by projecting the data to an Albers Equal-Area projection, summing values in the area field for each county, converting to square meters, and multiplying the results by 0.0000003681. These values may not match those reported by State or county governments, especially in coastal areas. Attribute_Definition_Source: National Atlas of the United States Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.018 Range_Domain_Maximum: 147812.985 Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: Earth Explorer, U.S. Geological Survey Contact_Address: Address_Type: Mailing address Address: U.S. Geological Survey Address: 47914 252nd Street City: Sioux Falls State_or_Province: SD Postal_Code: 57198-0001 Contact_Voice_Telephone: 605-594-6116 Contact_Voice_Telephone: 866-573-3222 Contact_Electronic_Mail_Address: lpdaac@usgs.gov Distribution_Liability: Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made by the U.S. Geological Survey regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty. No responsibility is assumed by the U.S. Geological Survey in the use of these data. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ESRI Shapefile Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: Fees: None Metadata_Reference_Information: Metadata_Date: 20120705 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: National Atlas of the United States Contact_Address: Address_Type: Mailing address Address: U.S. Geological Survey Address: 511 National Center Address: 12201 Sunrise Valley Drive City: Reston State_or_Province: VA Postal_Code: 20192 Contact_Voice_Telephone: 1-888-ASK-USGS (1-888-275-8747) Contact_Electronic_Mail_Address: atlasmail@usgs.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Security_Information: Metadata_Security_Classification_System: None Metadata_Security_Classification: Unclassified Metadata_Security_Handling_Description: None