Metadata:
  Identification_Information:
    Citation:
      Citation_Information:
        Originator: Jessica D. DeWitt
        Originator: Sarah E. Bergstresser
        Originator: Peter G. Chirico
        Originator: Inga E. Clark
        Publication_Date: 2018
        Title: The Central African Republic Diamond Database (2018) - Streamlines (DEM-Derived) with Names and Stream Order
        Geospatial_Data_Presentation_Form: GIS data
        Publication_Information:
          Publication_Place: Reston, VA
          Publisher: U.S. Geological Survey
        Online_Linkage: https://doi.org/10.5066/F7ZC81RD
        Larger_Work_Citation:
          Citation_Information:
            Originator: DeWitt, Jessica D.
            Originator: Chirico, Peter G.
            Originator: Bergstresser, Sarah E.
            Originator: Clark, Inga E.
            Publication_Date: 2018
            Title: The Central African Republic Diamond Database – A Geodatabase of Archival Diamond Occurrences and Areas of Recent Artisanal and Small-scale Diamond Mining
            Geospatial_Data_Presentation_Form: Open File Report
            Publication_Information:
              Publication_Place: Reston, VA
              Publisher: U.S. Geological Survey
    Description:
      Abstract: GIS polyline dataset which describes stream lines in the Central African Republic. This dataset was derived automatically from the hydrologically corrected 30m DEM published with the Central African Republic Diamond Database (2017) using ArcGIS 10.4 hydrologic tool. In brief, the workflow that created the streams included calculation of flow direction, flow accumulation, reclassification using a threshold of 7,000 cells, stream order, and finally conversion from raster data type to vector (polyline) data type. Streamlines have the Strahler stream order value as an attribute, as well as the name of the stream reach determined from reference maps (see DeWitt and others, 2018 for more details).
      Purpose: The purpose of this dataset is to describe the locations of streams in the Central African Republic. Streamlines also contain attributes describing the Strahler Stream Order and the name of the stream (if available).
    Time_Period_of_Content:
      Time_Period_Information:
        Single_Date/Time:
          Calendar_Date: 2017
      Currentness_Reference: publication date
    Status:
      Progress: Complete
      Maintenance_and_Update_Frequency: None planned
    Spatial_Domain:
      Bounding_Coordinates:
        West_Bounding_Coordinate: 14.150390620845
        East_Bounding_Coordinate: 27.861328120298
        North_Bounding_Coordinate: 11.393450325418
        South_Bounding_Coordinate: 2.5036481499899
    Keywords:
      Theme:
        Theme_Keyword_Thesaurus: USGS Thesaurus
        Theme_Keyword: river systems
      Theme:
        Theme_Keyword_Thesaurus: Alexandria Digital Library Feature Type Thesaurus
        Theme_Keyword: rivers
      Place:
        Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
        Place_Keyword: Central African Republic
    Access_Constraints: none
    Use_Constraints: Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. The U.S. Geological Survey requests to be acknowledged as originator of these data in future products or derivative research.
    Point_of_Contact:
      Contact_Information:
        Contact_Person_Primary:
          Contact_Person: Jessica D. DeWitt
          Contact_Organization: U.S. Geological Survey
        Contact_Address:
          Address_Type: mailing and physical
          Address: 12201 Sunrise Valley Dr.
          City: Reston
          State_or_Province: VA
          Postal_Code: 20192
          Country: USA
        Contact_Voice_Telephone: 703-648-6926
        Contact_Electronic_Mail_Address: jdewitt@usgs.gov
    Data_Set_Credit: U.S. Department of State, U.S. Agency for International Development
  Data_Quality_Information:
    Attribute_Accuracy:
      Attribute_Accuracy_Report: No formal attribute accuracy tests were conducted
    Logical_Consistency_Report: No formal logical accuracy tests were conducted
    Completeness_Report: Data set is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details.
    Positional_Accuracy:
      Horizontal_Positional_Accuracy:
        Horizontal_Positional_Accuracy_Report: No formal positional accuracy tests were conducted
      Vertical_Positional_Accuracy:
        Vertical_Positional_Accuracy_Report: No formal positional accuracy tests were conducted
    Lineage:
      Process_Step:
        Process_Description: GIS polyline dataset which describes stream lines in the Central African Republic. This dataset was derived automatically from the hydrologically corrected 30m DEM published with the Central African Republic Diamond Database (2017) using ArcGIS 10.4 hydrologic tools. Processing steps included calculation of flow direction, flow accumulation, reclassification using a threshold of 7,000 cells (see DeWitt et al. 2017 for more details), stream order, and finally conversion from raster data type to vector (polyline) data type. Streamlines have the name of the stream reach determined from reference maps (see DeWitt et al. 2017 for more details) as an attribute, as well as the Strahler stream order value.
        Process_Date: 2017
  Spatial_Data_Organization_Information:
    Indirect_Spatial_Reference: The dataset exists within the extent of the Central African Republic.
    Direct_Spatial_Reference_Method: Vector
  Spatial_Reference_Information:
    Horizontal_Coordinate_System_Definition:
      Planar:
        Map_Projection:
          Map_Projection_Name: Transverse Mercator
          Transverse_Mercator:
            Scale_Factor_at_Central_Meridian: 0.9996
            Longitude_of_Central_Meridian: 21.0
            Latitude_of_Projection_Origin: 0.0
            False_Easting: 500000.0
            False_Northing: 0.0
        Planar_Coordinate_Information:
          Planar_Coordinate_Encoding_Method: coordinate pair
          Coordinate_Representation:
            Abscissa_Resolution: 30.0
            Ordinate_Resolution: 30.0
          Planar_Distance_Units: METERS
      Geodetic_Model:
        Horizontal_Datum_Name: D_WGS_1984
        Ellipsoid_Name: WGS_1984
        Semi-major_Axis: 6378137.0
        Denominator_of_Flattening_Ratio: 298.257223563
  Entity_and_Attribute_Information:
    Detailed_Description:
      Entity_Type:
        Entity_Type_Label: CAR_streamlines
        Entity_Type_Definition: attribute table associated with GIS vector dataset
        Entity_Type_Definition_Source: Artisanal Mining Project
      Attribute:
        Attribute_Label: NAME
        Attribute_Definition: Name of the stream or river reach, if available; recorded from reference maps such as the U.S. Army Corps of Engineers Joint Operation Graphic (JOG) 1:250,000 scale maps.
        Attribute_Definition_Source: reference maps
        Attribute_Domain_Values:
          Unrepresentable_Domain: text field contains the name of the stream or river reach, if available.
      Attribute:
        Attribute_Label: Stream_order
        Attribute_Definition: value indicates the Strahler Stream Order for each stream reach polyline segment;
        Attribute_Definition_Source: calculated by ArcGIS 10.4 Stream Order tool
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: 1
            Enumerated_Domain_Value_Definition: First order stream, typically indicating an ephemeral or sometimes-dry stream reach that is a tributary to a larger stream.
            Enumerated_Domain_Value_Definition_Source: Strahler, A.N. (1957)
      Attribute:
        Attribute_Label: Shape_length
        Attribute_Definition: the length of the stream reach, in meters
        Attribute_Definition_Source: calculated by ArcGIS 10.4
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 0.417485
            Range_Domain_Maximum: 14491.537034
            Attribute_Units_of_Measure: meters
  Distribution_Information:
    Distributor:
      Contact_Information:
        Contact_Person_Primary:
          Contact_Person: Jessica D. DeWitt
          Contact_Organization: U.S. Geological Survey
        Contact_Address:
          Address_Type: mailing and physical
          Address: 12201 Sunrise Valley Dr.
          City: Reston
          State_or_Province: VA
          Postal_Code: 20192
          Country: USA
        Contact_Voice_Telephone: 703-648-6926
        Contact_Electronic_Mail_Address: jdewitt@usgs.gov
    Distribution_Liability: Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. The U.S. Geological Survey requests to be acknowledged as originator of these data in future products or derivative research.
    Technical_Prerequisites: This dataset is formatted as a feature class in an ESRI geodatabase. It requires the user to have geospatial software such as ESRI ArcGIS, Blue Marble Global Mapper, Que GIS, GRASS, or other GIS software.
  Metadata_Reference_Information:
    Metadata_Date: 20180405
    Metadata_Contact:
      Contact_Information:
        Contact_Person_Primary:
          Contact_Person: Jessica D. DeWitt
          Contact_Organization: U.S. Geological Survey
        Contact_Address:
          Address_Type: mailing and physical
          Address: 12201 Sunrise Valley Dr.
          City: Reston
          State_or_Province: VA
          Postal_Code: 20192
          Country: USA
        Contact_Voice_Telephone: 703-648-6926
        Contact_Electronic_Mail_Address: jdewitt@usgs.gov
    Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
    Metadata_Standard_Version: FGDC-STD-001-1998
