The Central African Republic Diamond Database (2018) - Streamlines (DEM-Derived) with Names and Stream Order

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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
Generated by mp version 2.9.47 on Thu Apr 5 06:52:23 2018