Metadata:
  Identification_Information:
    Citation:
      Citation_Information:
        Originator: Peter G. Chirico
        Originator: Jessica D. DeWitt
        Originator: Sarah E. Bergstresser
        Publication_Date: 2018
        Title: The Central African Republic Diamond Database (2018) - Surficial Geology
        Geospatial_Data_Presentation_Form: ESRI feature class (polygon) data
        Publication_Information:
          Publication_Place: Reston, VA
          Publisher: U.S. Geological Survey
        Online_Linkage: https://doi.org/10.5066/P9NFPUEO
        Larger_Work_Citation:
          Citation_Information:
            Originator: DeWitt, Jessica D., Chirico, Peter G., Bergstresser, Sarah E., and 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: GIS dataset
            Publication_Information:
              Publication_Place: Reston, VA
              Publisher: U.S. Geological Survey
    Description:
      Abstract: This GIS raster dataset describes the spatial extent of quaternary surficial geology in the Central African Republic (CAR). A national-scale geologic dataset published by Lescuyer and Milesi (2004) was digitized and modified to provide country-scale geospatial context for the geomorphologic terrain elements, which are the focus of investigations regarding alluvial and fluvial placer diamond deposits.
      Purpose: The polygons in this dataset provide country-scale geologic context for the geomorphologic terrain elements, which are the focus of investigations regarding alluvial and fluvial placer diamond deposits.
    Time_Period_of_Content:
      Time_Period_Information:
        Single_Date/Time:
          Calendar_Date: 2018
      Currentness_Reference: publication date
    Status:
      Progress: Complete
      Maintenance_and_Update_Frequency: None planned
    Spatial_Domain:
      Bounding_Coordinates:
        West_Bounding_Coordinate: 14.765624995817
        East_Bounding_Coordinate: 27.421874995312
        North_Bounding_Coordinate: 11.048608926563
        South_Bounding_Coordinate: 2.8548257978545
    Keywords:
      Theme:
        Theme_Keyword_Thesaurus: USGS Thesaurus
        Theme_Keyword: bedrock geologic units
      Place:
        Place_Keyword_Thesaurus: CommonGeographicAreas
        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: Peter G. Chirico
          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: 2019
          Country: USA
        Contact_Voice_Telephone: 703-648-6950
        Contact_Electronic_Mail_Address: pchirico@usgs.gov
  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: Mapped geologic data presented in conference proceedings was digitized and adapted for use in this study.  The full citation of this data source is: Lescuyer, J.L., and Milési, J.P., 2004, Africa GIS and SIGAfrique network – Geological and metallogenic information system, tools for sustainable development: France, 20éme Colloque de Géologie Africaine.
        Process_Date: 2017
  Spatial_Data_Organization_Information:
    Direct_Spatial_Reference_Method: Vector
  Spatial_Reference_Information:
    Horizontal_Coordinate_System_Definition:
      Geographic:
        Latitude_Resolution: 1.0
        Longitude_Resolution: 1.0
        Geographic_Coordinate_Units: Decimal degrees
      Geodetic_Model:
        Horizontal_Datum_Name: D_WVG_1984
        Ellipsoid_Name: GRS 1980
        Semi-major_Axis: 6378137.0
        Denominator_of_Flattening_Ratio: 298.257223563
  Entity_and_Attribute_Information:
    Detailed_Description:
      Entity_Type:
        Entity_Type_Label: Surficial_Geology
        Entity_Type_Definition: attribute table for Surficial_geology GIS polygons
        Entity_Type_Definition_Source: unknown
      Attribute:
        Attribute_Label: USGS_ATT
        Attribute_Definition: USGS attribute describing the major geochronologic epoch of each bedrock unit.
        Attribute_Definition_Source: U.S. Geological Survey
        Attribute_Domain_Values:
          Unrepresentable_Domain: Eoarchean, Paleoarchean, Mesoarchean,  Neoarchean, Paleoproterozoic, Mesoproterozoic, Neoproterozoic, Cambrian, Ordovician, Silurian, Devonian, Carboniferous, Permian, Triassic, Jurassic, Cretaceous, Paleogene-eogene, Quaternary
  Distribution_Information:
    Distributor:
      Contact_Information:
        Contact_Person_Primary:
          Contact_Person: Peter G. Chirico
          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: 703-648-6950
        Contact_Electronic_Mail_Address: pchirico@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 a 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: 20180409
    Metadata_Contact:
      Contact_Information:
        Contact_Person_Primary:
          Contact_Person: Jessica DeWitt
          Contact_Organization: U.S. Geologic 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
