Watersheds (WatershedPly)

Metadata also available as

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: United States Geologic Survey
Publication_Date: 20070425
Title: Watersheds (WatershedPly)
Geospatial_Data_Presentation_Form: vector digital data
Publication_Information:
Publisher: DC GIS
Online_Linkage:
<http://dcatlas.dcgis.dc.gov/catalog/download.asp?downloadName=WatershedPly&downloadTYPE=ESRI>
Online_Linkage:
<http://dcatlas.dcgis.dc.gov/catalog/download.asp?downloadName=WatershedPly&downloadTYPE=KMZ>
Larger_Work_Citation:
Citation_Information:
Originator: DC GIS
Title: DC Geographic Information System
Geospatial_Data_Presentation_Form: vector digital data
Description:
Abstract:
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:
This data is used for the planning and management of Washington, D.C. by local government agencies.
Supplemental_Information:
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:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20070425
Currentness_Reference: publication date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -77.385486
East_Bounding_Coordinate: -76.802990
North_Bounding_Coordinate: 39.203752
South_Bounding_Coordinate: 38.654647
Data_Set_G-Polygon:
Data_Set_G-Polygon_Outer_G-Ring:
G-Ring_Point:
Keywords:
Theme:
Theme_Keyword_Thesaurus: none
Theme_Keyword: Hydrology
Theme_Keyword: Watershed
Theme_Keyword: environment
Place:
Place_Keyword: Washington, D.C.
Place_Keyword: District of Columbia
Place_Keyword: DC
Place_Keyword: DC GIS
Place_Keyword: DCGIS
Use_Constraints:
For data terms and conditions, go to <http://dc.gov/page/terms-and-conditions-use-district-data>
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Office of the Chief Technology Officer
Contact_Person: GIS Data Coordinator
Contact_Address:
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: dcgis@dc.gov
Hours_of_Service: 8:30am - 5:30pm
Data_Set_Credit: United States Geologic Survey
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.780

Data_Quality_Information:
Attribute_Accuracy:
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:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report: 1:24000 source scale.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report: N/A
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
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:
Process_Description:
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:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Office of the Chief Technology Officer
Contact_Person: GIS Data Coordinator
Contact_Address:
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: dcgis@dc.gov
Hours_of_Service: 8:30am - 5:30pm
Process_Step:
Process_Description: Metadata imported.
Source_Used_Citation_Abbreviation: E:\DCGISDATA_WORKSPACE\Metadata\TemplateDCGIS.shp.xml
Process_Step:
Process_Description: Metadata imported.
Source_Used_Citation_Abbreviation:
W:\DCGISDATA_WORKSPACE\Metadata\Metadata_Template_Open_DCGIS.shp.xml
Process_Step:
Process_Description: Dataset copied.
Source_Used_Citation_Abbreviation: W:\DCGISDATA_WORKSPACE\DDOE\WatershedPly

Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: G-polygon
Point_and_Vector_Object_Count: 4

Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: State Plane Coordinate System 1983
State_Plane_Coordinate_System:
SPCS_Zone_Identifier: 1900
Lambert_Conformal_Conic:
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:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.001000
Ordinate_Resolution: 0.001000
Planar_Distance_Units: meters
Geodetic_Model:
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:
Altitude_System_Definition:
Altitude_Resolution: 1.000000
Altitude_Encoding_Method:
Explicit elevation coordinate included with horizontal coordinates

Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: DCGIS.WatershedPly
Attribute:
Attribute_Label: Name
Attribute_Definition: Watershed Name
Attribute:
Attribute_Label: OBJECTID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: NAME
Attribute:
Attribute_Label: SHAPE
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: SHAPE.AREA
Attribute:
Attribute_Label: Shape
Attribute_Definition: Feature geometry
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: HUC_10
Attribute_Definition: 10 Digit (watershed) Hydrologic Unit Code
Attribute:
Attribute_Label: SHAPE.LEN

Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: DC Office of the Chief Technology Officer
Contact_Person: GIS Data Coordinator
Contact_Address:
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: dcgis@dc.gov
Hours_of_Service: 8:30 am - 5:30 pm
Resource_Description: Downloadable Data
Distribution_Liability:
For data terms and conditions, go to <http://dc.gov/page/terms-and-conditions-use-district-data>
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Transfer_Size: 0.089
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Ordering_Instructions: All data is available at <http://opendata.dc.gov>

Metadata_Reference_Information:
Metadata_Date: 20071214
Metadata_Review_Date: 04/25/07
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: D.C. Office of the Chief Technology Officer
Contact_Person: GIS Data Coordinator
Contact_Address:
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: dcgis@dc.gov
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:
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