Identification_Information:
  Citation:
    Citation_Information:
      Originator: U.S. Geological Survey
      Publication_Date: 200101
      Title: Urban Areas of the United States
      Publication_Information:
        Publication_Place: Reston, Virginia
        Publisher: U.S. Geological Survey
      Online_Linkage: <http://nationalatlas.gov/atlasftp.html>

  Description:
    Abstract: 
      This data set includes a selection of urban areas in the United States 
      derived from the urban areas layer of the Digital Chart of the World 
      (DCW).  This is a revised version of the 1998 data set. Only minor 
      corrections have been made.

    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 1:2,000,000-scale data.  
      No responsibility is assumed by the U.S. Geological Survey in the use of 
      these data. 

  Time_Period_of_Content:
    Time_Period_Information:
      Single_Date/Time:
        Calendar_Date: 200101
    Currentness_Reference: publication date

  Status:
    Progress: Complete
    Maintenance_and_Update_Frequency: None planned

  Spatial_Domain:
    Bounding_Coordinates:
      West_Bounding_Coordinate: 172
      East_Bounding_Coordinate: -66
      North_Bounding_Coordinate: 72
      South_Bounding_Coordinate: 18

  Keywords:
    Theme:
      Theme_Keyword_Thesaurus: None
      Theme_Keyword: urban areas
      Theme_Keyword: populated places
    Place:
      Place_Keyword_Thesaurus:
        U.S. Department of Commerce, 1977, Countries, Dependencies, Areas of
        Special Sovereignty, and Their Principal Administrative Divisions
        (Federal Information Processing Standard (FIPS) 10-3): Washington, DC,
        National Institute of Standards and Technology.
      Place_Keyword: United States
    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: USA
      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

  Access_Constraints: None
  Use_Constraints: 
    None.  Acknowledgment of the National Atlas of the United States of America 
    and (or) the U.S. Geological Survey would be appreciated in products 
    derived from these data.  
  Point_of_Contact:
    Contact_Information:
      Contact_Person_Primary:
        Contact_Person: Gita Urban-Mathieux
        Contact_Organization: U.S. Geological Survey
      Contact_Address:
        Address_Type: mailing address
        Address: 521 National Center
        City: Reston
        State_or_Province: VA
        Postal_Code: 20192
      Contact_Voice_Telephone: 703-648-5175
      Contact_Electronic_Mail_Address: atlasmail@usgs.gov

Data_Quality_Information:
  Logical_Consistency_Report:  
    No additional checks for topological consistency were performed on 
    this data set.
  Completeness_Report: 
    This data set contains urban areas for the 50 United States.
  Lineage:
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: National Imagery and Mapping Agency (NIMA)
          Publication_Date: 1994
          Title: Digital Chart of the World
          Publication_Information:
            Publication_Place: Reston, VA
            Publisher: U.S. Geological Survey
      Type_of_Source_Media: CD-ROM
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Single_Date/Time:
            Calendar_Date: 1994
        Source_Currentness_Reference: publication date
      Source_Citation_Abbreviation: DCW
      Source_Contribution: spatial and attribute information

    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: U.S. Geological Survey
          Publication_Date: 1998
          Title: State Boundaries of the United States
          Publication_Information:
            Publication_Place: Reston, Virginia
            Publisher: U.S. Geological Survey
      Source_Scale_Denominator: 2000000
      Type_of_Source_Media: online
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Single_Date/Time:
            Calendar_Date: 1998
        Source_Currentness_Reference: publication date
      Source_Citation_Abbreviation: ATLAS-STATE
      Source_Contribution: spatial information

    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: U.S. Geological Survey
          Publication_Date: 1998
          Title: Cities and Towns of the United States
          Publication_Information:
            Publication_Place: Reston, Virginia
            Publisher: U.S. Geological Survey
      Source_Scale_Denominator: 2000000
      Type_of_Source_Media: online
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Range_of_Dates/Times:
            Beginning_Date: 1972
            Ending_Date: 1994
        Source_Currentness_Reference: ground condition
      Source_Citation_Abbreviation: ATLAS-CITIES98
      Source_Contribution: spatial and attribute information

    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: U.S. Geological Survey
          Publication_Date: 1998
          Title: Hydrography Features of the United States
          Publication_Information:
            Publication_Place: Reston, Virginia
            Publisher: U.S. Geological Survey
      Source_Scale_Denominator: 2000000
      Type_of_Source_Media: online
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Single_Date/Time:
            Calendar_Date: 1998
        Source_Currentness_Reference: publication date
      Source_Citation_Abbreviation: ATLAS-HY
      Source_Contribution: spatial information

    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: U.S. Geological Survey
          Publication_Date: 1998
          Title: Urban Areas of the United States
          Publication_Information:
            Publication_Place: Reston, Virginia
            Publisher: U.S. Geological Survey
      Source_Scale_Denominator: 2000000
      Type_of_Source_Media: online
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Single_Date/Time:
            Calendar_Date: 1998
        Source_Currentness_Reference: publication date
      Source_Citation_Abbreviation: ATLAS-URBAN98
      Source_Contribution: spatial information

    Process_Step:
      Process_Description:
        Urban polygons from the Digital Chart of the World (DCW) CD-ROM were 
        extracted and converted to Arc/INFO format.  Where the urban boundaries 
        extended beyond the shoreline of ATLAS-STATES, the shoreline was matched 
        to the ATLAS-STATES shoreline.  Names of the urban areas were added 
        using names in ATLAS-CITIES98. In large metropolitan areas many smaller 
        areas were labeled as part of the metropolitan area.  The State in which 
        the urban area is located was also added.  Several areas were modified 
        to conform to the 1:2,000,000-scale hydrography (ATLAS-HY) layer.  Some 
        smaller polygons that represent undeveloped areas within the urban area 
        were removed and merged with the larger urban area.  Military 
        reservations were also removed.  Finally, the attribute for State FIPS 
        was added.
      Source_Used_Citation_Abbreviation: DCW
      Source_Used_Citation_Abbreviation: ATLAS-STATE
      Source_Used_Citation_Abbreviation: ATLAS-HY
      Source_Used_Citation_Abbreviation: ATLAS-CITIES98
      Process_Date: 1998
      Source_Produced_Citation_Abbreviation: ATLAS-URBAN98

    Process_Step:
      Process_Description:
        The spellings for San Francisco, CA and Bismarck, ND were corrected.
      Source_Used_Citation_Abbreviation: ATLAS-URBAN98
      Process_Date: 200101

Spatial_Data_Organization_Information:
  Direct_Spatial_Reference_Method: Vector
  Point_and_Vector_Object_Information:
    SDTS_Terms_Description:
      SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains
      Point_and_Vector_Object_Count: 6176

Spatial_Reference_Information:
  Horizontal_Coordinate_System_Definition:
    Geographic:
      Latitude_Resolution: 0.02083333
      Longitude_Resolution: 0.02083333
      Geographic_Coordinate_Units: Decimal degrees
    Geodetic_Model:
      Horizontal_Datum_Name: North American Datum of 1983
      Ellipsoid_Name: GRS1980
      Semi-major_Axis: 6378137.0
      Denominator_of_Flattening_Ratio: 298.257222

Entity_and_Attribute_Information:
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: Urban Areas (described by Urbanap020.dbf)
      Entity_Type_Definition: 
        Urban areas are places where large populations exist.
      Entity_Type_Definition_Source: U.S. Geological Survey
    Attribute:
      Attribute_Label: Shape
      Attribute_Definition: The representation of the entity in the data.
      Attribute_Definition_Source: U.S. Geological Survey
      Attribute_Domain_Values:
        Enumerated_Domain:
          Enumerated_Domain_Value: Polygon
          Enumerated_Domain_Value_Definition: A 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.
      Attribute_Definition_Source: U.S. Geological Survey
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 0.000
          Range_Domain_Maximum: 0.298
    Attribute:
      Attribute_Label: Perimeter
      Attribute_Definition: The perimeter of the shape in coverage units.
      Attribute_Definition_Source: U.S. Geological Survey
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 0.001
          Range_Domain_Maximum: 6.774
    Attribute:
      Attribute_Label: Urbanap020
      Attribute_Definition: Internal feature number.
      Attribute_Definition_Source: U.S. Geological Survey
      Attribute_Domain_Values:
        Range_Domain:
          Range_Domain_Minimum: 2
          Range_Domain_Maximum: 6177
    Attribute:
      Attribute_Label: Name
      Attribute_Definition: The name of the urban area.
      Attribute_Definition_Source: U.S. Geological Survey
      Attribute_Domain_Values
        Unrepresentable_Domain: 
          There is no predefined set of valid urban area names. Name represents
          the most significant place that is in the polygon.
    Attribute:  
      Attribute_Label: State 
      Attribute_Definition: 
        The 2-character FIPS code of the State or State equivalent.  Where the 
        urban area falls in more than one State, the codes are separated by 
        dashes: DC-VA-MD.
      Attribute_Definition_Source: U.S. Geological Survey 
      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, National Institute of Standards and
            Technology
    Attribute:
      Attribute_Label: State_fips
      Attribute_Definition: 
        The 2-digit FIPS code of the State or State equivalent.  Where the 
        urban area falls in more than one State, the codes are separated by 
        dashes: 11-51-24.
      Attribute_Definition_Source: U.S. Geological Survey
      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, National Institute of Standards and
            Technology
Distribution_Information:
  Distributor:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: 
          Earth Science Information Center, U.S. Geological Survey
      Contact_Address:
        Address_Type: mailing address
        Address: 507 National Center
        City: Reston
        State_or_Province: VA
        Postal_Code: 20192
      Contact_Voice_Telephone: 1-888-ASK-USGS (1-888-275-8747) 
      Contact_Voice_Telephone: 703-648-5920
      Contact_Instructions:
        In addition to the address above, there are other ESIC offices 
        throughout the country.  A full list of these offices is at
        <http://mapping.usgs.gov/esic/esic_index.html>.

  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:
                <http://nationalatlas.gov/atlasftp.html>
      Digital_Transfer_Option:
        Offline_Option:
          Offline_Media: CD-ROM
          Recording_Format: tar
    Digital_Form:
      Digital_Transfer_Information:
        Format_Name: SDTS
      Digital_Transfer_Option:
        Online_Option:
          Computer_Contact_Information:
            Network_Address:
              Network_Resource_Name:
                <http://nationalatlas.gov/atlasftp.html>
      Digital_Transfer_Option:
        Offline_Option:
          Offline_Media: CD-ROM
          Recording_Format: tar
    Fees:
      There is no charge for the online option.  For National Atlas files
      ordered on CD-ROM there is a base price of $45.00 per disc, a handling
      fee of $5.00, and a per-file charge based on file size.  The charge for
      files less than 10 megabytes in size is $1.00.  The charge for files that
      range in size from 10 to 150 megabytes is $7.50.  The charge for files
      of 150 megabytes or larger is $15.00.  The charge is $1.00 for the Urban
      Areas of the United States data set.
    Ordering_Instructions:
      To order files on CD-ROM, please see
      <http://nationalatlas.gov/atlasftp.html#q12>.

Metadata_Reference_Information:
  Metadata_Date: 20011029
  Metadata_Contact:
    Contact_Information:
      Contact_Person_Primary:
        Contact_Person: Gita Urban-Mathieux
        Contact_Organization: U.S. Geological Survey
      Contact_Address:
        Address_Type: mailing address
        Address: 521 National Center
        City: Reston
        State_or_Province: VA
        Postal_Code: 20192
      Contact_Voice_Telephone: 703-648-5175
      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

