Watersheds (WatershedPly)
Metadata also available as
Metadata:
- Identification_Information:
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- Citation:
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- Citation_Information:
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- Originator: United States Geologic Survey
- Publication_Date: 20070425
- Title: Watersheds (WatershedPly)
- Geospatial_Data_Presentation_Form: vector digital data
- Publication_Information:
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- Publisher: DC GIS
- Online_Linkage:
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<http://dcatlas.dcgis.dc.gov/catalog/download.asp?downloadName=WatershedPly&downloadTYPE=ESRI>
- Online_Linkage:
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<http://dcatlas.dcgis.dc.gov/catalog/download.asp?downloadName=WatershedPly&downloadTYPE=KMZ>
- Larger_Work_Citation:
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- Citation_Information:
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- Originator: DC GIS
- Title: DC Geographic Information System
- Geospatial_Data_Presentation_Form: vector digital data
- Description:
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- Abstract:
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This dataset is a complete digital hydrologic unit boundary layer to the watershed (10-digit) 6th level at 1:24,000 scale. This data set consists of geo-referenced digital data and associated attributes created in accordance with the "FGDC Proposal, Version 1.0 - Federal Standards For Delineation of Hydrologic Unit Boundaries 3/01/02 ( <http://www.ftw.nrcs.usda.gov/huc_data.html> ). The hydrologic unit boundaries provide a uniquely identified and uniform method of subdividing large drainage areas.
Polygons are attributed with hydrologic unit codes, names, downstream hydrologic unit, flow modifications, and hydrologic unit type for 4th level (8-digit) sub-basin, 5th level (10-digit) watershed, 6th level (12-digit) subwatershed, and acres for subwatershed. An accompanying line shapefile is attributed with the highest hydrologic unit level for each hydrologic unit, linesource, and a metadata reference file.
All DC GIS data is stored and exported in Maryland State Plane coordinates NAD 83 meters.
METADATA CONTENT IS IN PROCESS OF VALIDATION AND SUBJECT TO CHANGE.
- Purpose:
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This data is used for the planning and management of Washington, D.C. by local government agencies.
- Supplemental_Information:
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A text document that is provided with the data called Watershed Boundary Dataset (WBD) User Guide provides information on the methodology used to delineate the hydrologic units and provides definition for all the attributes. The smaller sized 6th level sub-watersheds (most within 10,000 to 40,000 acres) are useful for numerous application programs supported by a variety of local, State, and Federal Agencies. This data set is intended to be used as a tool for water-resource management and planning activities, particularly for site-specific and localized studies requiring a level of detail provided by large-scale map information.
Until the entire nation is complete and HUC_8 codes are stable, the Geospatial Data Gateway will only be serving two WBD layers; HU12 linework and HU12 polygons (which consists of HUC_8, HUC_10, and HUC_12 codes, as well as HUC_10 and HUC_12 names). If you would like to derive HUC_2, HUC_4, HUC_6 codes and names or HUC_8 names, these values can be dissolved from WBD HU12 then joined to the USGS layer (HUC250K) for naming purposes. When ordering from the Gateway, the HUC250K USGS layer is listed as "8-Digit Hydrologic Units 1:250,000". For instructions about how to derive HU2, HU4, HU6, or HU8 codes or names, see the following document: <ftp://ftp.ftw.nrcs.usda.gov/pub/wbd/hu_qa/wbdhu8.doc>
- Time_Period_of_Content:
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- Time_Period_Information:
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- Single_Date/Time:
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- Calendar_Date: 20070425
- Currentness_Reference: publication date
- Status:
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- Progress: Complete
- Maintenance_and_Update_Frequency: As needed
- Spatial_Domain:
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- Bounding_Coordinates:
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- West_Bounding_Coordinate: -77.385486
- East_Bounding_Coordinate: -76.802990
- North_Bounding_Coordinate: 39.203752
- South_Bounding_Coordinate: 38.654647
- Data_Set_G-Polygon:
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- Data_Set_G-Polygon_Outer_G-Ring:
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- G-Ring_Point:
- Keywords:
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- Theme:
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- Theme_Keyword_Thesaurus: none
- Theme_Keyword: Hydrology
- Theme_Keyword: Watershed
- Theme_Keyword: environment
- Place:
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- Place_Keyword: Washington, D.C.
- Place_Keyword: District of Columbia
- Place_Keyword: DC
- Place_Keyword: DC GIS
- Place_Keyword: DCGIS
- Use_Constraints:
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For data terms and conditions, go to <http://dc.gov/page/terms-and-conditions-use-district-data>
- Point_of_Contact:
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- Contact_Information:
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- Contact_Organization_Primary:
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- Contact_Organization: Office of the Chief Technology Officer
- Contact_Person: GIS Data Coordinator
- Contact_Address:
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- Address_Type: mailing and physical address
- Address: 441 4th St NW, Suite 930 South
- City: Washington
- State_or_Province: DC
- Postal_Code: 20001
- Country: USA
- Contact_Facsimile_Telephone: 202-727-5660
- Contact_Electronic_Mail_Address: [email protected]
- Hours_of_Service: 8:30am - 5:30pm
- Data_Set_Credit: United States Geologic Survey
- Native_Data_Set_Environment:
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Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.780
- Data_Quality_Information:
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- Attribute_Accuracy:
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- Attribute_Accuracy_Report: Validated by source and/or responsible agency.
- Logical_Consistency_Report: Validated by source and/or responsible agency.
- Completeness_Report: Validated by source and/or responsible agency.
- Positional_Accuracy:
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- Horizontal_Positional_Accuracy:
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- Horizontal_Positional_Accuracy_Report: 1:24000 source scale.
- Vertical_Positional_Accuracy:
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- Vertical_Positional_Accuracy_Report: N/A
- Lineage:
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- Source_Information:
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- Source_Citation:
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- Citation_Information:
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- Originator: United States Geologic Survey
- Title: Water Boundary Data - 12 digit Hydrologic Units
- Online_Linkage: <http://www.usgs.gov>
- Type_of_Source_Media: geofile
- Source_Citation_Abbreviation: Water Boundary Data - 12 digit Hydrologic Units
- Source_Contribution: locations and attribution
- Process_Step:
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- Process_Description:
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Data was download from the USDA geospatial center. Then staff selected all watersheds that touch the DC boundary and exported the selection set to a new watershed layer.
- Source_Used_Citation_Abbreviation: C:\OCTOGIS\Data\Metadata\TemplateDCStat
- Process_Date: 04/25/07
- Process_Contact:
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- Contact_Information:
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- Contact_Organization_Primary:
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- Contact_Organization: Office of the Chief Technology Officer
- Contact_Person: GIS Data Coordinator
- Contact_Address:
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- Address_Type: mailing and physical address
- Address: 200 I Street SE, 5th Floor
- City: Washington
- State_or_Province: DC
- Postal_Code: 20001
- Country: USA
- Contact_Facsimile_Telephone: 202-727-5660
- Contact_Electronic_Mail_Address: [email protected]
- Hours_of_Service: 8:30am - 5:30pm
- Process_Step:
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- Process_Description: Metadata imported.
- Source_Used_Citation_Abbreviation: E:\DCGISDATA_WORKSPACE\Metadata\TemplateDCGIS.shp.xml
- Process_Step:
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- Process_Description: Metadata imported.
- Source_Used_Citation_Abbreviation:
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W:\DCGISDATA_WORKSPACE\Metadata\Metadata_Template_Open_DCGIS.shp.xml
- Process_Step:
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- Process_Description: Dataset copied.
- Source_Used_Citation_Abbreviation: W:\DCGISDATA_WORKSPACE\DDOE\WatershedPly
- Spatial_Data_Organization_Information:
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- Direct_Spatial_Reference_Method: Vector
- Point_and_Vector_Object_Information:
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- SDTS_Terms_Description:
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- SDTS_Point_and_Vector_Object_Type: G-polygon
- Point_and_Vector_Object_Count: 4
- Spatial_Reference_Information:
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- Horizontal_Coordinate_System_Definition:
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- Planar:
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- Grid_Coordinate_System:
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- Grid_Coordinate_System_Name: State Plane Coordinate System 1983
- State_Plane_Coordinate_System:
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- SPCS_Zone_Identifier: 1900
- Lambert_Conformal_Conic:
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- Standard_Parallel: 38.300000
- Standard_Parallel: 39.450000
- Longitude_of_Central_Meridian: -77.000000
- Latitude_of_Projection_Origin: 37.666667
- False_Easting: 400000.000000
- False_Northing: 0.000000
- Planar_Coordinate_Information:
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- Planar_Coordinate_Encoding_Method: coordinate pair
- Coordinate_Representation:
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- Abscissa_Resolution: 0.001000
- Ordinate_Resolution: 0.001000
- Planar_Distance_Units: meters
- Geodetic_Model:
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- 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
- Vertical_Coordinate_System_Definition:
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- Altitude_System_Definition:
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- Altitude_Resolution: 1.000000
- Altitude_Encoding_Method:
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Explicit elevation coordinate included with horizontal coordinates
- Entity_and_Attribute_Information:
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- Detailed_Description:
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- Entity_Type:
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- Entity_Type_Label: DCGIS.WatershedPly
- Attribute:
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- Attribute_Label: Name
- Attribute_Definition: Watershed Name
- Attribute:
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- Attribute_Label: OBJECTID
- Attribute_Definition: Internal feature number.
- Attribute_Definition_Source: ESRI
- Attribute_Domain_Values:
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- Unrepresentable_Domain:
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Sequential unique whole numbers that are automatically generated.
- Attribute:
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- Attribute_Label: NAME
- Attribute:
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- Attribute_Label: SHAPE
- Attribute_Definition: Feature geometry.
- Attribute_Definition_Source: ESRI
- Attribute_Domain_Values:
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- Unrepresentable_Domain: Coordinates defining the features.
- Attribute:
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- Attribute_Label: SHAPE.AREA
- Attribute:
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- Attribute_Label: Shape
- Attribute_Definition: Feature geometry
- Attribute_Definition_Source: ESRI
- Attribute_Domain_Values:
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- Unrepresentable_Domain: Coordinates defining the features.
- Attribute:
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- Attribute_Label: HUC_10
- Attribute_Definition: 10 Digit (watershed) Hydrologic Unit Code
- Attribute:
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- Attribute_Label: SHAPE.LEN
- Distribution_Information:
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- Distributor:
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- Contact_Information:
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- Contact_Organization_Primary:
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- Contact_Organization: DC Office of the Chief Technology Officer
- Contact_Person: GIS Data Coordinator
- Contact_Address:
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- Address_Type: mailing and physical address
- Address: 200 I Street SE, 5th Floor
- City: Washington
- State_or_Province: DC
- Postal_Code: 20001
- Country: USA
- Contact_Facsimile_Telephone: (202) 727-5660
- Contact_Electronic_Mail_Address: [email protected]
- Hours_of_Service: 8:30 am - 5:30 pm
- Resource_Description: Downloadable Data
- Distribution_Liability:
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For data terms and conditions, go to <http://dc.gov/page/terms-and-conditions-use-district-data>
- Standard_Order_Process:
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- Digital_Form:
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- Digital_Transfer_Information:
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- Transfer_Size: 0.089
- Digital_Transfer_Option:
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- Online_Option:
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- Computer_Contact_Information:
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- Network_Address:
- Ordering_Instructions: All data is available at <http://opendata.dc.gov>
- Metadata_Reference_Information:
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- Metadata_Date: 20071214
- Metadata_Review_Date: 04/25/07
- Metadata_Contact:
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- Contact_Information:
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- Contact_Organization_Primary:
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- Contact_Organization: D.C. Office of the Chief Technology Officer
- Contact_Person: GIS Data Coordinator
- Contact_Address:
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- Address_Type: mailing and physical address
- Address: 200 I Street SE, 5th Floor
- City: Washington
- State_or_Province: DC
- Postal_Code: 20001
- Country: USA
- Contact_Facsimile_Telephone: (202) 727-5660
- Contact_Electronic_Mail_Address: [email protected]
- Hours_of_Service: 8:30 am - 5 pm
- Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
- Metadata_Standard_Version: FGDC-STD-001-1998
- Metadata_Time_Convention: local time
- Metadata_Extensions:
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- Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
- Profile_Name: ESRI Metadata Profile
Generated by mp version 2.9.12 on Thu Jun 25 14:49:18 2015