Watersheds (WatershedPly)

Data format: SDE Feature Class

File or table name: DCGIS.WatershedPly

Coordinate system: State Plane Coordinate System 1983

Theme keywords: Hydrology, Watershed, environment

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.

FGDC and ESRI Metadata:

Metadata elements shown with blue text are defined in the Federal Geographic Data Committee's (FGDC) Content Standard for Digital Geospatial Metadata (CSDGM). Elements shown with green text are defined in the ESRI Profile of the CSDGM. Elements shown with a green asterisk (*) will be automatically updated by ArcCatalog. ArcCatalog adds hints indicating which FGDC elements are mandatory; these are shown with gray text.

Identification Information:


Citation:
Citation information:
Originators: United States Geologic Survey


Title:
Watersheds (WatershedPly)
*File or table name: DCGIS.WatershedPly


Publication date: 20070425
*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:
Originators: 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

*Language of dataset: en


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

Local bounding coordinates:
*Left bounding coordinate: 366703.613500
*Right bounding coordinate: 417016.680500
*Top bounding coordinate: 170625.338000
*Bottom bounding coordinate: 109739.449000

Data set G-polygon:
Data set G-polygon outer G-ring:
G-Ring point:

Keywords:
Theme:
Theme keywords: Hydrology, Watershed, environment
Theme keyword thesaurus: none

Place:
Place keywords: Washington, D.C., District of Columbia, DC, DC GIS, DCGIS

Access constraints: Contact OCTO GIS. Any data obtained outside of OCTO GIS are unauthorized copies.
Use constraints:
Acknowledgment of the DC Geographic Information Systems Program (DC GIS).  The District of Columbia Government makes no claims as to the completeness, accuracy or content of any data contained hereon, and makes no representation of any kind, including, but not limited to, the warranty of the accuracy or fitness for a  particular use, nor are any such warranties to be implied or inferred with respect to the information or data furnished herein.

Point of contact:
Contact information:
Contact organization primary:
Contact person: GIS Data Coordinator
Contact organization: Office of the Chief Technology Officer

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 dataset format: SDE Feature Class
*Native data set environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.780


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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:
Originators: 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.

Process date: 04/25/07


Source used citation abbreviation:
C:\OCTOGIS\Data\Metadata\TemplateDCStat


Process contact:
Contact information:
Contact organization primary:
Contact person: GIS Data Coordinator
Contact organization: Office of the Chief Technology Officer

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



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


Process step:
Process description:
Dataset copied.

Source used citation abbreviation:
Server=dcgiscentral.in.dc.gov; Service=5151; User=dcgis_user; Version=SDE.DEFAULT


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Spatial Data Organization Information:


*Direct spatial reference method: Vector


Point and vector object information:
SDTS terms description:
*Name: DCGIS.WatershedPly
*SDTS point and vector object type: G-polygon
*Point and vector object count: 4

ESRI terms description:
*Name: DCGIS.WatershedPly
*ESRI feature type: Simple
*ESRI feature geometry: Polygon
*ESRI topology: FALSE
*ESRI feature count: 4
*Spatial index: TRUE
*Linear referencing: FALSE


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Spatial Reference Information:


Horizontal coordinate system definition:
Coordinate system name:
*Projected coordinate system name: NAD_1983_StatePlane_Maryland_FIPS_1900
*Geographic coordinate system name: GCS_North_American_1983

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

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Entity and Attribute Information:


Detailed description:
*Name: DCGIS.WatershedPly


Entity type:
*Entity type label: DCGIS.WatershedPly
*Entity type type: Feature Class
*Entity type count: 4

Attribute:
*Attribute label: Name
*Attribute alias: Name
Attribute definition:
Watershed Name

*Attribute type: String
*Attribute width: 50


Attribute:
*Attribute label: OBJECTID
*Attribute alias: OBJECTID
*Attribute definition:
Internal feature number.
*Attribute definition source:
ESRI

*Attribute type: OID
*Attribute width: 4
*Attribute precision: 10
*Attribute scale: 0


Attribute domain values:
*Unrepresentable domain:
Sequential unique whole numbers that are automatically generated.


Attribute:
*Attribute label: NAME
*Attribute alias: NAME


*Attribute type: String
*Attribute width: 50
*Attribute precision: 0
*Attribute scale: 0


Attribute:
*Attribute label: SHAPE
*Attribute alias: Shape
*Attribute definition:
Feature geometry.
*Attribute definition source:
ESRI

*Attribute type: Geometry
*Attribute width: 4
*Attribute precision: 0
*Attribute scale: 0


Attribute domain values:
*Unrepresentable domain:
Coordinates defining the features.


Attribute:
*Attribute label: SHAPE.AREA
*Attribute alias: SHAPE.AREA


*Attribute type: Double
*Attribute width: 0
*Attribute precision: 0
*Attribute scale: 0


Attribute:
*Attribute label: Shape
*Attribute alias: Shape
Attribute definition:
Feature geometry
*Attribute definition source:
ESRI

*Attribute type: Geometry
*Attribute width: 0
*Attribute precision: 0
*Attribute scale: 0


Attribute domain values:
*Unrepresentable domain:
Coordinates defining the features.


Attribute:
*Attribute label: HUC_10
*Attribute alias: HUC_10
Attribute definition:
10 Digit (watershed) Hydrologic Unit Code

*Attribute type: String
*Attribute width: 10


Attribute:
*Attribute label: SHAPE.LEN
*Attribute alias: SHAPE.LEN


*Attribute type: Double
*Attribute width: 0
*Attribute precision: 0
*Attribute scale: 0


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Distribution Information:


Distributor:
Contact information:
Contact organization primary:
Contact person: GIS Data Coordinator
Contact organization: DC Office of the Chief Technology Officer

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: 8:30 am - 5:30 pm



Resource description: Downloadable Data


Distribution liability:
Acknowledgment of the DC Geographic Information Systems Program (DC GIS).  The District of Columbia Government makes no claims as to the completeness, accuracy or content of any data contained hereon, and makes no representation of any kind, including, but not limited to, the warranty of the accuracy or fitness for a  particular use, nor are any such warranties to be implied or inferred with respect to the information or data furnished herein.

Standard order process:
Digital form:
Digital transfer information:
*Transfer size: 0.089
*Dataset size: 0.089

Digital transfer option:
Online option:
Computer contact information:
Network address:

Ordering instructions:
Most DC GIS datasets can be downloaded from "http://dcgis.dc.gov" on the data center page.  Orders can also be made by contacting OCTO GIS at "dcgis@dc.gov", especially for datasets not available for download.


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Metadata Reference Information:


*Metadata date: 20071214
Metadata review date: 04/25/07


*Language of metadata: en


Metadata contact:
Contact information:
Contact organization primary:
Contact person: GIS Data Coordinator
Contact organization: D.C. Office of the Chief Technology Officer

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: 8:30 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

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Geoprocessing History:


Process:
*Date: 20070503
*Time: 234921
*Tool location: C:\Program Files\ArcGIS\ArcToolbox\Toolboxes\Data Management Tools.tbx\CopyFeatures
*Command issued: CopyFeatures E:\DataLoad042607\WatershedPly.shp "Database Connections\dcgiscentral Data Loader.sde\DCGIS.Environment\DCGIS.WatershedPly" DCGISDBP_S 10000 0 0


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