Metadata:
  Identification_Information:
    Citation:
      Citation_Information:
        Originator: Peter G. Chirico
        Originator: Jessica D. DeWitt
        Originator: Sarah E. Bergstresser
        Originator: Inga E. Clark
        Publication_Date: 2018
        Title: The Central African Republic Diamond Database (2018) - Archival ASM and Diamond Occurrences Dataset
        Geospatial_Data_Presentation_Form: GIS data
        Publication_Information:
          Publication_Place: Reston, VA
          Publisher: U.S. Geological Survey
        Online_Linkage: https://doi.org/10.5066/F74748M5
        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: This GIS dataset is a point shapefile, wherein each point describes the location of a diamond occurrence recorded in a variety of published and unpublished forms. For this purpose,'diamond occurrence' is defined as locations where diamonds have been recovered or observed. Sources of diamond occurrence are diverse and potentially include fieldwork, reports of artisanal mine sites, diamond mining company sample records, geologic maps and mine sites interpreted from satellite imagery acquired prior to January 1, 2013.
      Purpose: These data were collected as part of a larger Diamond Database for the Central African Republic, with the goal of describing the geographic distribution of archival and current diamond occurrences in order to examine links between diamond resources and violent conflicts in the country.
      Supplemental_Information: A second dataset, titled "The Central African Republic Diamond Database - Recent ( 2013-2016) Mining Activity" is closely associated with this dataset, and both should be used in describing the geographic distribution of CAR's diamond resources.
    Time_Period_of_Content:
      Time_Period_Information:
        Multiple_Dates/Times:
          Single_Date/Time:
            Calendar_Date: 1964
          Single_Date/Time:
            Calendar_Date: 1972
          Single_Date/Time:
            Calendar_Date: 1976
          Single_Date/Time:
            Calendar_Date: 1980
          Single_Date/Time:
            Calendar_Date: 1983
          Single_Date/Time:
            Calendar_Date: 1991
          Single_Date/Time:
            Calendar_Date: 1993
          Single_Date/Time:
            Calendar_Date: 1994
          Single_Date/Time:
            Calendar_Date: 1996
          Single_Date/Time:
            Calendar_Date: 1998
          Single_Date/Time:
            Calendar_Date: 2004
          Single_Date/Time:
            Calendar_Date: 2005
          Single_Date/Time:
            Calendar_Date: 2007
          Single_Date/Time:
            Calendar_Date: 2008
          Single_Date/Time:
            Calendar_Date: 2010
          Single_Date/Time:
            Calendar_Date: 2013
      Currentness_Reference: Publication dates for articles, maps, etc. used as reference to create the dataset
    Status:
      Progress: Complete
      Maintenance_and_Update_Frequency: None planned
    Spatial_Domain:
      Bounding_Coordinates:
        West_Bounding_Coordinate: 14.462403948899
        East_Bounding_Coordinate: 27.426271135882
        North_Bounding_Coordinate: 10.96233471064
        South_Bounding_Coordinate: 2.3719315539959
    Keywords:
      Theme:
        Theme_Keyword_Thesaurus: USGS Thesaurus
        Theme_Keyword: gem resources
        Theme_Keyword: placer deposit mining
      Place:
        Place_Keyword_Thesaurus: CommonGeographicAreas
        Place_Keyword: Central African Republic
      Stratum:
        Stratum_Keyword_Thesaurus: LithClass6.2
        Stratum_Keyword: Alluvium
    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: 20192
          Country: USA
        Contact_Voice_Telephone: 703-648-6950
        Contact_Electronic_Mail_Address: pchirico@usgs.gov
    Data_Set_Credit: U.S. Department of State, U.S. Agency for International Development
    Cross_Reference:
      Citation_Information:
        Originator: Chirico, Peter G.
        Originator: DeWitt, Jessica D.
        Originator: Bergstresser, Sarah E.
        Originator: Clark, Inga E.
        Publication_Date: 2018
        Title: Recent mining areas 2013-2017
        Publication_Information:
          Publication_Place: Reston, VA
          Publisher: U.S. Geological Survey
  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: Locations of historic ASM activity and diamond occurrences were compiled into the Archival Diamond Occurrence point geodatabase from a variety of published and un-published data sources. For this purpose, diamond occurrence is defined as locations where diamonds have been recovered. Source records of historic diamond occurrences are diverse and may include fieldwork, reports of artisanal mine sites, diamond mining company pit sample records, geologic maps and mine sites interpreted from satellite imagery prior to 2013. Each diamond occurrence in the geodatabase was attributed with information identifying the source, the publication year of the source, and the type of diamond occurrence. (i.e. ASM site, field sample, and occurrence). Additional details regarding the compilation of this dataset can be found in the OFR assocaited with the dataset's publication (DeWitt and others, 2018)
        Process_Date: 2017
  Spatial_Data_Organization_Information:
    Indirect_Spatial_Reference: Latitude and longitude coordinates, World Geodetic System 1984 (WGS84) Universal Transverse Mercator (UTM) Zone 34 N coordinates
    Direct_Spatial_Reference_Method: Point
  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: 10.0
            Ordinate_Resolution: 10.0
          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: Archival Diamond Occurrences in the Central African Republic
        Entity_Type_Definition: archival diamond occurrence geographic locations and attributes
        Entity_Type_Definition_Source: USGS Artisanal Diamonds Project
      Attribute:
        Attribute_Label: OBJECTID
        Attribute_Definition: Unique identifier number for each point record
        Attribute_Definition_Source: Automatically named and populated by ESRI ArcGIS 10.4
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: 1
            Range_Domain_Maximum: 2604
        Attribute_Domain_Values:
          Codeset_Domain:
            Codeset_Name: Shape
            Codeset_Source: ESRI ArcGIS 10.4
      Attribute:
        Attribute_Label: UniqueID
        Attribute_Definition: Non-GIS unique identification code that links each point to the source (map or otherwise) that it came from
        Attribute_Definition_Source: USGS Artisanal Diamonds Project
        Attribute_Domain_Values:
          Unrepresentable_Domain: The first 3 letters of the point record's source, followed by a sequential, unique, whole number labeling the record within that source.
      Attribute:
        Attribute_Label: Source
        Attribute_Definition: The author and date of the source data from which the point was collected.
        Attribute_Definition_Source: Data source citation
        Attribute_Domain_Values:
          Unrepresentable_Domain: This field describes the author and date of the source from which the point record was collected. Using this information, the source's full citation information may be found in the OFR publication for this work (DeWitt, et al. 2017).
      Attribute:
        Attribute_Label: Source_Dat
        Attribute_Definition: Source Date: The year in which the data source was published.
        Attribute_Definition_Source: Data source citation
        Attribute_Domain_Values:
          Unrepresentable_Domain: The publication year of the data source. This column may be sorted to help identify contemporary and older points in the dataset.
      Attribute:
        Attribute_Label: Source_Cat
        Attribute_Definition: Source Category: A generalized descriptor of the type of source from which the point record was collected
        Attribute_Definition_Source: USGS Artisanal Diamond Project
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Article
            Enumerated_Domain_Value_Definition: Textual document/record, published in a peer-reviewed journal, containing a map with diamond occurrences or a table of diamond occurrence location coordinates.
            Enumerated_Domain_Value_Definition_Source: USGS Artisanal Diamonds Project
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Field Data
            Enumerated_Domain_Value_Definition: In Situ observation of diamond occurrences by the USGS or USAID
            Enumerated_Domain_Value_Definition_Source: USGS Artisanal Diamonds Project
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Map
            Enumerated_Domain_Value_Definition: Cartographic product with points or polygons indicating areas of diamond mining
            Enumerated_Domain_Value_Definition_Source: USGS Artisanal Diamonds Project
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Map and Text
            Enumerated_Domain_Value_Definition: Cartographic product with points or polygons indicating areas of diamond mining, accompanied by textual report of mineral resources
            Enumerated_Domain_Value_Definition_Source: USGS Artisanal Diamonds Project
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Report
            Enumerated_Domain_Value_Definition: Documented observations from a mining company or other informal publication
            Enumerated_Domain_Value_Definition_Source: USGS Artisanal Diamonds Project
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Satellite Imagery
            Enumerated_Domain_Value_Definition: Observation of ASM indicators in very high resolution (VHR) panchromatic or multispectral satellite imagery - see OFR section 'Interpretation of Recent (2013-2016) Mining' for details
            Enumerated_Domain_Value_Definition_Source: USGS Artisanal Diamonds Project
      Attribute:
        Attribute_Label: Type
        Attribute_Definition: Observation Type: provides generalized description of the level of detail or accuracy that a point record may have.
        Attribute_Definition_Source: USGS Artisanal Diamonds Project
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: ASM Site
            Enumerated_Domain_Value_Definition: Indicates a location at which diamond ASM mining was observed, but without specific information regarding the presence or absence of diamonds at the site
            Enumerated_Domain_Value_Definition_Source: USGS Artisanal Diamonds Project
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Field Sample
            Enumerated_Domain_Value_Definition: Indicates a location at which detailed observations have been made of surficial geology and/ or diamond resources, typically from a Report
            Enumerated_Domain_Value_Definition_Source: USGS Artisanal Diamonds Project
        Attribute_Domain_Values:
          Enumerated_Domain:
            Enumerated_Domain_Value: Diamond Occurrence
            Enumerated_Domain_Value_Definition: Generic observation indicating a location at which diamonds have been recovered
            Enumerated_Domain_Value_Definition_Source: USGS Artisanal Diamonds Project
      Attribute:
        Attribute_Label: Latitude
        Attribute_Definition: Y coordinate, in decimal degrees of WGS 84 for the point record's location
        Attribute_Definition_Source: WGS 1984
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: -90
            Range_Domain_Maximum: 90
            Attribute_Units_of_Measure: decimal degrees
      Attribute:
        Attribute_Label: Longitude
        Attribute_Definition: X coordinate, in decimal degrees of WGS 84 for the point record's location
        Attribute_Definition_Source: WGS 1984
        Attribute_Domain_Values:
          Range_Domain:
            Range_Domain_Minimum: -180
            Range_Domain_Maximum: 180
            Attribute_Units_of_Measure: decimal degrees
      Attribute:
        Attribute_Label: N_UTM34N
        Attribute_Definition: Y coordinate, in meters of WGS 84 UTM 34N for the point record's location
        Attribute_Definition_Source: WGS 84 UTM 34 N
        Attribute_Domain_Values:
          Unrepresentable_Domain: projected coordinates
      Attribute:
        Attribute_Label: E_UTM34N
        Attribute_Definition: X coordinate, in meters of WGS 84 UTM 34N for the point record's location
        Attribute_Definition_Source: WGS 84 UTM 34 N
        Attribute_Domain_Values:
          Unrepresentable_Domain: projected coordinates
  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 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: 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
    Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
    Metadata_Standard_Version: FGDC-STD-001-1998
