Identification_Information:
  Citation:
    Citation_Information:
      Originator: Terri Arnold
      Publication_Date: Unpublished Material
      Publication_Time: 2008
      Title: Confidence of maximum likelihood classification results
      Geospatial_Data_Presentation_Form: Fgdb raster digital data
      Series_Information:
      Publication_Information:
      Other_Citation_Details: 
      Online_Linkage: none
      Larger_Work_Citation:
        Citation_Information:
          Publication_Date: 2008
          Title: From SIR2008-5015, Hydrochemical regions of the glacial aquifer system and their environmental and water quality characteristics
          Series_Information:
            Series_Name: USGS SIR
            Issue_Identification: 2008-5015
  Description:
    Abstract: 
          This data set was created for SIR2008-5015 to map hydrochemical regions of the glacial aquifer system.  It was created from the maximum likelihood classification tool in ArcGIS 9.2 as an optional output from the classification.The delineation of hydrochemical regions of an aquifer system, as defined in this report, is appropriate for use only in large regional-scale studies. Confidence in the water-quality characteristics that are extrapolated to unsampled areas of the hydrochemical regions is necessarily low; in contrast, confidence generally is high where data were actually collected. A confidence map was made along with the hydrochemical regions map as an optional output from the MLC analysis. The confidence map shows locations where hydrochemical region classifications have a higher or lower probability of being correct based on the environmental characteristics at the location, as compared to characteristics stored in the signature file for the training sample. 
    Purpose: This data set was created for SIR2008-5015 to map hydrochemical regions of the glacial aquifer system.
  Time_Period_of_Content:
    Time_Period_Information:
      Single_Date/Time:
        Calendar_Date: 1997
        Time_of_Day: unknown
    Currentness_Reference: publication date
  Status:
    Progress: Complete
    Maintenance_and_Update_Frequency: None planned
  Spatial_Domain:
    Bounding_Coordinates:
      West_Bounding_Coordinate: -142.169385
      East_Bounding_Coordinate: -52.098856
      North_Bounding_Coordinate: 55.424004
      South_Bounding_Coordinate: 17.378117
  Keywords:
    Theme: confidence, hydrochemical regions
      Theme_Keyword_Thesaurus: none
      Theme_Keyword: glacial aquifer
      Theme_Keyword: hydrochemical region confidence
      Theme_Keyword: 
    Place:
      Place_Keyword: United States
  Access_Constraints: For internal use only.
  Use_Constraints: For internal use only.
  Point_of_Contact:
    Contact_Information:
      Contact_Person_Primary:
        Contact_Person: Terri Arnold
        Contact_Organization: US Geological Survey
      Contact_Position: Cartographer/GIS Specialist
      Contact_Voice_Telephone: 217-328-9702
      Contact_Facsimile_Telephone: 217-344-0082
      Contact_Electronic_Mail_Address: tlarnold@usgs.gov
  Data_Set_Credit: 
  Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.2.4.1420
Data_Quality_Information:
  Lineage:
    Source_Information:
      Source_Citation:
        Citation_Information:
          Originator: USGS
          Publication_Date: 
          Publication_Time: Unknown
          Title: 
          Geospatial_Data_Presentation_Form: map
          Series_Information:
            Series_Name: 
            Issue_Identification: 
          Publication_Information:
            Publication_Place: 
            Publisher: USGS
          Other_Citation_Details: 
          Online_Linkage: 
      Source_Scale_Denominator: 
      Source_Contribution: 
    Process_Step:
      Process_Description:
           See methods description in SIR 2008-5015
      Process_Date: 2008
      Process_Contact:
        Contact_Information:
          Contact_Person_Primary:
            Contact_Person: Terri Arnold
            Contact_Organization: USGS
          Contact_Position: GIS Specialist
          Contact_Voice_Telephone: 217-328-9702
          Contact_Electronic_Mail_Address: tlarnold@usgs.gov
    Process_Step:
      Process_Description: import into geodatabase
      Process_Date: 2008
Spatial_Data_Organization_Information:
  Direct_Spatial_Reference_Method: Raster
  Raster_Object_Information:
    Raster_Object_Type: Pixel
    Row_Count: 7276
    Column_Count: 13024
    Vertical_Count: 1
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: row and column
        Coordinate_Representation:
          Abscissa_Resolution: 500.000000
          Ordinate_Resolution: 500.000000
        Planar_Distance_Units: meters
    Geodetic_Model:
      Horizontal_Datum_Name: North American Datum of 1983
      Ellipsoid_Name: Geodetic Reference System 80
      Semi-major_Axis: 6378137.000000
      Denominator_of_Flattening_Ratio: 298.257222
Entity_and_Attribute_Information:
  Detailed_Description:
    Attribute:
      Attribute_Label: value
      Attribute_Definition: Integer indicating confidence range
      Attribute_Domain_Values: 1,2,3,4,5,6
    Attribute:
      Attribute_Label: conf
      Attribute_Definition: range of confidence of maximum likelihood classification 
      Attribute_Domain_Values: >90 to 100, >75 to 90, >50 to 75, >25 to 50, >10 to 25, 0 to 10
Distribution_Information:
  Resource_Description: By Request to Terri Arnold (tlarnold@usgs.gov)
Metadata_Reference_Information:
  Metadata_Date: 20080827
  Metadata_Contact:
    Contact_Information:
      Contact_Person_Primary:
        Contact_Person: Terri Arnold
        Contact_Organization: USGS
      Contact_Position: GIS Specialist
      Contact_Address:
        Address_Type: mailing and physical address
        Address: 1201 W University Ave, Suite 100
        City: Urbana
        State_or_Province: IL
        Postal_Code: 61801
        Country: USA
      Contact_Voice_Telephone: 217-328-9702
      Contact_Electronic_Mail_Address: tlarnold@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_Extensions:
    Online_Linkage: http://www.esri.com/metadata/esriprof80.html
    Profile_Name: ESRI Metadata Profile
