Identification_Information:
  Citation:
    Citation_Information:
      Originator: Marilyn Flynn
      Publication_Date: Unpublished Material
      Title: State Boundaries, Western United States
      Geospatial_Data_Presentation_Form: vector digital data
      Publication_Information:
      Other_Citation_Details: Original data set may be obtained from www.nationalatlas.gov
      Online_Linkage: http://www.nationalatlas.gov
  Description:
    Abstract:
      This data set contains state boundaries. This data set is a subset of a national data set obtained from the National Atlas of the United States of America (nationalatlas.gov). The metadata for this data set is the original data set metadata; however, it was updated to reflect the changes that occured while creating this subset. This data set was used as part of U.S. Geological Survey Scientific Investigations Report 2006-5315, "Dissolved solids in basin-fill aquifers and streams in the Southwestern United States", by Anning and others (http://water.usgs.gov/nawqa/studies/mrb/salinity.html).data set was clipped from the original data set to the boundary of the study area.  

      The original data set contians the State boundaries of the United States, and the boundaries of Puerto Rico and the U.S. Virgin Islands.  The map layer was
      created by extracting the State boundary polygons from the individual
      1:2,000,000-scale State boundary Digital Line Graph (DLG) files produced
      by the U.S. Geological Survey.  These files were then merged into a single
      coverage.  The original data set is an updated version of the June 2002 map layer; the date when each State was admitted to the United States was added.
    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 National Atlas of the United States in
      the use of these data.
  Time_Period_of_Content:
    Time_Period_Information:
      Range_of_Dates/Times:
        Beginning_Date: 1972
        Ending_Date: 2005
    Currentness_Reference: ground condition
  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: Boundaries
      Theme_Keyword: State boundaries
      Theme_Keyword: States
      Theme_Keyword: Statehood
    Place:
      Place_Keyword: Arizona
      Place_Keyword: California
      Place_Keyword: Colorado
      Place_Keyword: Idaho
      Place_Keyword: Nevada
      Place_Keyword: New Mexico
      Place_Keyword: Oregon
      Place_Keyword: Utah
      Place_Keyword: Wyoming
  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_Person_Primary:
        Contact_Person: Marilyn Flynn
        Contact_Organization: U.S. Geological Survey, Arizona Water Science Center
      Contact_Position: Hydrologist
      Contact_Address:
        Address_Type: mailing and physical address
        Address: 2255 N. Gemini Drive
        Address: MS 561
        City: Flagstaff
        State_or_Province: AZ
        Postal_Code: 86001
      Contact_Voice_Telephone: (928)556-7184
      Contact_Electronic_Mail_Address: meflynn@usgs.gov
  Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.2.2.1350
Data_Quality_Information:
  Logical_Consistency_Report:
    The map layer was checked for topological consistency using the Arc/INFO
    command BUILD.  No other checks for logical consistency were performed on
    this map layer.
  Completeness_Report:
    This map layer includes State boundaries for all 50 States, and boundaries

    for Puerto Rico and the U.S. Virgin Islands.  Data completeness generally
    reflects the content of the original DLG files.
  Lineage:
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: U.S. Geological Survey
          Publication_Date: 1995
          Title: 1:2,000,000-scale Digital Line Graph Data - Boundaries
          Publication_Information:
            Publication_Place: Reston, VA
            Publisher: U.S. Geological Survey
      Source_Scale_Denominator: 2000000
      Type_of_Source_Media: CD-ROM
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Range_of_Dates/Times:
            Beginning_Date: 1970
            Ending_Date: 1995
        Source_Currentness_Reference: publication date
      Source_Citation_Abbreviation: 2MILBD
      Source_Contribution: Spatial and attribute information
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: National Atlas of the United States
          Publication_Date: 1998
          Title: Hydrography Features of the United States
          Publication_Information:
            Publication_Place: Reston, VA
            Publisher: National Atlas of the United States
      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-HY98
      Source_Contribution: Spatial information
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: National Atlas of the United States
          Publication_Date: 1998
          Title: State Boundaries of the United States
          Publication_Information:
            Publication_Place: Reston, VA
            Publisher: National Atlas of the United States
      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-STATES98
      Source_Contribution: Spatial and attribute information
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: National Atlas of the United States
          Publication_Date: 199903
          Title: Hydrography Features of the United States
          Publication_Information:
            Publication_Place: Reston, Virginia
            Publisher: National Atlas of the United States
      Source_Scale_Denominator: 2000000
      Type_of_Source_Media: Online
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Single_Date/Time:
            Calendar_Date: 199903
        Source_Currentness_Reference: Publication date
      Source_Citation_Abbreviation: ATLAS-HY9903
      Source_Contribution: Spatial and attribute information
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: National Atlas of the United States
          Publication_Date: 199903
          Title: State Boundaries of the United States
          Publication_Information:
            Publication_Place: Reston, VA
            Publisher: National Atlas of the United States
      Source_Scale_Denominator: 2000000
      Type_of_Source_Media: Online
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Single_Date/Time:
            Calendar_Date: 1999
        Source_Currentness_Reference: Publication date
      Source_Citation_Abbreviation: ATLAS-STATES9903
      Source_Contribution: Spatial and attribute information
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: U.S. Geological Survey
          Publication_Date: Unknown
          Title: 1:100,000-scale USGS topographic maps
          Publication_Information:
            Publication_Place: Reston, VA
            Publisher: U.S. Geological Survey
      Source_Scale_Denominator: 100000
      Type_of_Source_Media: paper
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Single_Date/Time:
            Calendar_Date: unknown
        Source_Currentness_Reference: publication date
      Source_Citation_Abbreviation: 1:100,000-scale base maps
      Source_Contribution: spatial and attribute information
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: National Atlas of the United States
          Publication_Date: 199911
          Title: State Boundaries of the United States
          Publication_Information:
            Publication_Place: Reston, VA
            Publisher: National Atlas of the United States
      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: 1999
        Source_Currentness_Reference: Ground condition
      Source_Citation_Abbreviation: ATLAS-STATES199911
      Source_Contribution: Spatial and attribute information
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: National Atlas of the United States
          Publication_Date: 200206
          Title: County Boundaries of the United States
          Publication_Information:
            Publication_Place: Reston, VA
            Publisher: National Atlas of the United States
      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: 2001
        Source_Currentness_Reference: Ground condition
      Source_Citation_Abbreviation: ATLAS-CNTY200206
      Source_Contribution: Spatial and attribute information
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: National Atlas of the United States
          Publication_Date: 200206
          Title: State Boundaries of the United States
          Publication_Information:
            Publication_Place: Reston, VA
            Publisher: National Atlas of the United States
      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: 2002
        Source_Currentness_Reference: Ground condition
      Source_Citation_Abbreviation: ATLAS-STATES200206
      Source_Contribution: Spatial and attribute information
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: U.S. Government Printing Office
          Publication_Date: 20031104
          Title: Ben's Guide to U.S. Government
          Publication_Information:
            Publication_Place: Washington, DC
            Publisher: U.S. Government Printing Office
          Online_Linkage: <http://bensguide.gpo.gov/3-5/state/index.html>
      Type_of_Source_Media: Online
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Single_Date/Time:
            Calendar_Date: 20031104
        Source_Currentness_Reference: Ground condition
      Source_Citation_Abbreviation: STATEHOOD
      Source_Contribution: Attribute information
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: National Atlas of the United States
          Publication_Date: 200301
          Title: Streams and Waterbodies of the United States
          Publication_Information:
            Publication_Place: Reston, VA
            Publisher: National Atlas of the United States
          Online_Linkage: <http://nationalatlas.gov/atlasftp.html>
      Source_Scale_Denominator: 2000000
      Type_of_Source_Media: Online
      Source_Time_Period_of_Content:
        Time_Period_Information:
          Single_Date/Time:
            Calendar_Date: 200301
        Source_Currentness_Reference: Publication date
      Source_Citation_Abbreviation: ATLAS-hydro
      Source_Contribution: Spatial and attribute information
    Process_Step:
      Process_Description:
        The 2MILBD data files were originally digitized by the National Mapping
        Discipline of the U.S. Geological Survey (USGS), based on the sectional
        maps contained in 'The National Atlas of the United States of America'
        published by the USGS in 1970.  The sectional maps were updated during
        1978-1981 and digitized in the early 1980's.  The data were updated
        again in the early 1990's by the USGS and published on CD-ROM in 1995 as
        State DLGs.  These DLG files were updated in 1997.  Using Arc/INFO
        software, the DLG optional format files were converted to Arc/INFO
        coverages using the DLGARC command.  Only State political boundaries and
        attribute information were extracted for inclusion.  The file was
        compared to ATLAS-HY98.  State boundary lines that crossed open water
        were excluded for graphic purposes, and polygons that represented
        islands were attributed with the appropriate State information.  The
        individual State coverages were then merged together using the Arc/INFO
        command MAPJOIN.  'Slivers' created during the MAPJOIN process were
        identified and deleted using the ELIMINATE command.
      Source_Used_Citation_Abbreviation: 2MILBD
      Source_Used_Citation_Abbreviation: ATLAS-HY98
      Process_Date: 1998
      Source_Produced_Citation_Abbreviation: ATLAS-STATES98
    Process_Step:
      Process_Description:
        The spatial features in ATLAS-STATES98 were compared to ATLAS-HY9903 and
        modified where necessary.  Incorrect attributes were corrected.  Puerto
        Rico and the U.S. Virgin Islands were added.
      Source_Used_Citation_Abbreviation: ATLAS-STATES98
      Source_Used_Citation_Abbreviation: ATLAS-HY9903
      Process_Date: 1999
      Source_Produced_Citation_Abbreviation: ATLAS-STATES9903
    Process_Step:
      Process_Description: A minor adjustment was made to the shoreline in Galveston Bay, Texas.
      Source_Used_Citation_Abbreviation: ATLAS-STATES9903
      Source_Used_Citation_Abbreviation: 1:100,000 scale base maps
      Process_Date: 1999
      Source_Produced_Citation_Abbreviation: ATLAS-STATES199911
    Process_Step:
      Process_Description:
        Boundary adjustments of 1 square mile or greater were made between
        the following:
        >1. Arkansas and Mississippi
        >2. Arkansas and Oklahoma
        >3. Arkansas and Tennessee
        >4. Idaho and Montana
        >5. Idaho and Oregon
        >6. Illinois and Missouri
        >7. Iowa and Nebraska
        >8. Louisiana and Mississippi
        >9. Missouri and Nebraska
        >10. Montana and Wyoming
        >11. Nebraska and South Dakota
        >12. Oklahoma and Texas
        >13. Tennessee and Virginia
        >14. Texas and Mexico (southern border of Texas)
        In addition, some minor adjustments were made to other States.
      Source_Used_Citation_Abbreviation: ATLAS-CNTY200206
      Source_Used_Citation_Abbreviation: ATLAS-STATES199911
      Process_Date: 200205
      Source_Produced_Citation_Abbreviation: ATLAS-STATES200206
    Process_Step:
      Process_Description:
        Attributes were added that provide, for each State, the month, day, and
        year of admission to the United States.  The order of admission was also
        added.  In addition, two line segments along the Texas/Mexico border
        were modified to align to ATLAS-hydro.
      Source_Used_Citation_Abbreviation: ATLAS-STATES200206
      Source_Used_Citation_Abbreviation: STATEHOOD
      Source_Used_Citation_Abbreviation: ATLAS-hydro
      Process_Date: 200505
    Process_Step:
      Process_Description: Deleted unneeded attributes. Changed State to STATE.
      Process_Contact:
        Contact_Information:
          Contact_Person_Primary:
            Contact_Person: Marilyn Flynn
            Contact_Organization: U.S. Geological Survey, Arizona Water Science Center
          Contact_Address:
            Address_Type: mailing and physical address
            Address: 2255 N. Gemini Drive
            City: Flagstaff
            State_or_Province: Arizona
            Postal_Code: 86001
            Country: USA
          Contact_Voice_Telephone: (929)556-7184
          Contact_Electronic_Mail_Address: meflynn@usgs.gov
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.
  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: 2895
Spatial_Reference_Information:
  Horizontal_Coordinate_System_Definition:
    Planar:
      Map_Projection:
        Map_Projection_Name: Albers Conical Equal Area
        Albers_Conical_Equal_Area:
          Standard_Parallel: 29.500000
          Standard_Parallel: 45.500000
          Longitude_of_Central_Meridian: -96.000000
          Latitude_of_Projection_Origin: 23.000000
          False_Easting: 0.000000
          False_Northing: 0.000000
      Planar_Coordinate_Information:
        Planar_Coordinate_Encoding_Method: coordinate pair
        Coordinate_Representation:
          Abscissa_Resolution: 0.004096
          Ordinate_Resolution: 0.004096
        Planar_Distance_Units: meters
    Geodetic_Model:
      Horizontal_Datum_Name: North American Datum of 1983
      Ellipsoid_Name: GRS1980
      Semi-major_Axis: 6378137
      Denominator_of_Flattening_Ratio: 298.257222
  Vertical_Coordinate_System_Definition:
    Altitude_System_Definition:
      Altitude_Resolution: 0.000010
      Altitude_Encoding_Method: Explicit elevation coordinate included with horizontal coordinates
Entity_and_Attribute_Information:
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: State
      Entity_Type_Definition:
        First order division of a nation, including States and State
        equivalents.
      Entity_Type_Definition_Source: National Atlas of the United States
    Attribute:
      Attribute_Label: OBJECTID
      Attribute_Definition: Internal feature number.
      Attribute_Definition_Source: ESRI
      Attribute_Domain_Values:
        Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated.
    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: STATE
      Attribute_Definition: The name of the State or State equivalent.
      Attribute_Definition_Source: National Atlas of the United States
    Attribute:
      Attribute_Label: Shape_Length
      Attribute_Definition: Length of feature in internal units.
      Attribute_Definition_Source: ESRI
      Attribute_Domain_Values:
        Unrepresentable_Domain: Positive real numbers that are automatically generated.
    Attribute:
      Attribute_Label: Shape_Area
      Attribute_Definition: Area of feature in internal units squared.
      Attribute_Definition_Source: ESRI
      Attribute_Domain_Values:
        Unrepresentable_Domain: Positive real numbers that are automatically generated.
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://geography.usgs.gov/esic/esic_index.html>.
  Resource_Description: Original data set may be obtained from www.nationalatlas.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: <http://nationalatlas.gov/atlasftp.html>
    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>
    Fees: There is no charge for this map layer.
Metadata_Reference_Information:
  Metadata_Date: 20050601
  Metadata_Contact:
    Contact_Information:
      Contact_Person_Primary:
        Contact_Person: Peg Rawson
        Contact_Organization: National Atlas of the United States
      Contact_Address:
        Address_Type: Mailing address
        Address: 12201 Sunrise Valley Dr
        Address: MS 561
        City: Reston
        State_or_Province: VA
        Postal_Code: 20192
      Contact_Voice_Telephone: 703-648-4183
      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_Time_Convention: local time
  Metadata_Security_Information:
    Metadata_Security_Classification_System: None
    Metadata_Security_Classification: Unclassified
    Metadata_Security_Handling_Description: None
  Metadata_Extensions:
    Online_Linkage: http://www.esri.com/metadata/esriprof80.html
    Profile_Name: ESRI Metadata Profile