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Connecticut Watershed Boundary Dataset Line
SDE Feature Class - depgis.DEP.WATERSHED_BOUNDARY_DATASET_LINE
FGDC, ESRI Metadata
DescriptionGraphicSpatialData StructureData QualityData SourceData DistributionMetadata
+ Resource Description
Citation
Information used to reference the data.
Title: Connecticut Watershed Boundary Dataset Line
Originators: U.S. Department of Agriculture, Natural Resources Conservation Service
Publisher: U.S. Department of Agriculture, Natural Resources Conservation Service
Publication place: Fort Worth, TX
Publication date: 2001
Data type: vector digital data
Other citation details:
Initially entitled ct_hu12_geo83, this dataset was renamed NRCS Watershed Boundary Dataset Line when it was converted to the Connecticut State Plane Coordinate System (NAD 83) for use by the State of Connecticut, Department of Environmental Protection in 2005.
Description
A characterization of the data, including its intended use and limitations.
Abstract:
This data set is a digital hydrologic unit boundary layer that is at the Subwatershed (12-digit) level. The original data set was developed by delineating the boundary lines on base USGS 1:24000 scale topographic quadrangle, and digitizing the delineated lines. Digital Raster Graphics (DRG) images were used for edits to the data layer. 

This data set consists of geo-referenced digital map data and attribute data. The spatial data are in a statewide coverage format and include complete coverage of the entire state of Connecticut, and small parts of surrounding states. The hydrologic unit ID code attached to each delineated polygon is linked to the attribute data.
Purpose:
The Watershed and Subwatershed hydrologic unit boundaries provide a uniquely identified and uniform method of subdividing large drainage areas. These smaller sized hydrologic units (up to 250,000 acres) are useful in many programs supported by the Natural Resources Conservation Service and others.
Language of dataset: en
Point Of Contact
Contact information for the individual or organization that is knowledgeable about the data.
Organization: U.S. Department of Agriculture, Natural Resources Conservation Service
Position: GIS Specialist
Phone: 860-871-4011
Fax: 860-871-4054
Telecommunications Device or Teletypewriter (TDD/TTY) phone: 202 720 7808 (Office of Public Affairs)
Address type: mailing address
Address:
344 Merrow Road
City: Tolland
State or Province: Connecticut
Postal code: 06084-3917
Country: USA
Data Type
How the data are represented, formatted and maintained by the data producing organization.
File or table name: depgis.DEP.WATERSHED_BOUNDARY_DATASET_LINE
Data type: vector digital data
Data format: SDE Feature Class
Native dataset environment: These data are maintained by the State of Connecticut using ArcGIS software developed by Environmental Systems Research Institute (ESRI) in a Microsoft Windows operating system environment.
Time Period of Data
Time period(s) for which the data corresponds to the currentness reference.
Date: 2001
Currentness reference:
publication date
Status
The state of and maintenance information for the data.
Data status: Complete
Update frequency: As needed
Key Words
Words or phrases that summarize certain aspects of the data.
Theme:
Keywords: Hydrologic Units, Watershed Boundary Dataset, Subwatersheds, WBD, Watersheds
Keyword thesaurus: None
Place:
Keywords: New England, Connecticut
Keyword thesaurus: Counties and County Equivalents of the States of the United States and the
Place:
Keywords: Northeastern United States
Keyword thesaurus: USGS Topographic Map Names Data Base
Data Access Constraints
Restrictions and legal prerequisites for accessing or using the data after access is granted.
Access constraints:
None
Use constraints:
The U.S. Department of Agriculture, Natural Resources Conservation Service, should be acknowledged as the data source in products derived from these data. 

This data set is to be used as a primary reference source. This is public information and may be interpreted by organizations, agencies, units of government, or others based on needs; however, they are responsible for the appropriate application. Federal, State, or local regulatory bodies are not to reassign to the Natural Resources Conservation Service any authority for the decisions they make. 

Photographic or digital enlargement of these maps to scales greater than that at which they were originally delineated can cause misrepresentation of the data. If enlarged, the maps will not include the fine detail that would be appropriate for mapping at the small scale. Digital data files are periodically updated. Files are dated, and users are responsible for obtaining the latest version of the data.
+ Graphic Example
Browse Graphic
Graphic illustration of the data.
Browse graphic 1
Open - Full view of Connecticut Watershed Boundary Dataset polygon and line features.
Graphic Image

Browse graphic 2
Open - Detailed view of Connecticut Watershed Boundary Dataset polygon and line features. Watersheds are labeled with the 12-digit Hydrologic Unit Code (HUC12).
Graphic Image

Browse graphic 3
Open - Detailed view of Connecticut Watershed Boundary Dataset polygon and line features. Watersheds are labeled with the 10-digit Hydrologic Unit Code (HUC10).
Graphic Image

Browse graphic 4
Open - Detailed view of Connecticut Watershed Boundary Dataset polygon and line features. Watersheds are labeled with the 8-digit Hydrologic Unit Code (HUC8).
Graphic Image
+ Spatial Reference Information
Horizontal Coordinate System
Reference system from which linear or angular quantities are measured and assigned to the position that a point occupies.
Projected coordinate system:
Name: NAD 1983 StatePlane Connecticut FIPS 0600 Feet
Map units: survey feet
Geographic coordinate system:
Name: GCS North American 1983
Coordinate System Details
Map projection
Map projection name: Lambert Conformal Conic
Standard parallel: 41.200000
Standard parallel: 41.866667
Longitude of central meridian: -72.750000
Latitude of projection origin: 40.833333
False easting: 999999.999996
False northing: 499999.999998
Planar Coordinate Information
Planar coordinate encoding method: coordinate pair
Coordinate representation:
Abscissa resolution: 0.000250
Ordinate resolution: 0.000250
Planar distance units: survey feet
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
Reference system from which vertical distances (altitudes or depths) are measured.
Altitude system definition:
Altitude datum name: North American Vertical Datum of 1988
Altitude resolution: unknown
Altitude distance units: meters
Altitude encoding method: Implicit coordinate
Spatial Domain
The geographic areal domain of the data that describes the western, eastern, northern, and southern geographic limits of data coverage.
Bounding Coordinates
In Projected or local coordinates
NAD 1983 StatePlane Connecticut FIPS 0600 Feet
BoundaryCoordinate
Left727909.084000 (survey feet)
Right1302633.064000 (survey feet)
Top1010902.406000 (survey feet)
Bottom539975.799000 (survey feet)
In Unprojected coordinates (geographic)
GCS North American 1983
BoundaryCoordinate
West -73.737982 (longitude)
East -71.646339 (longitude)
North 42.233967 (latitude)
South 40.939104 (latitude)
+ Data Structure and Attribute Information
Overview
Summary of the information content of the data, including other references to complete descriptions of entity types, attributes, and attribute values for the data.
Entity and attribute overview:
Hydrologic Unit delineations are closed polygons that encompass all area draining toward the lowest point (called outlet) in the polygon. Because of nominal sizes for the different hydrologic unit levels (Watershed (40,000 to 250,000 acres) and Subwatershed (3,000 minimum, generally 10,000 to 40,000 acres)), some polygons do not include all areas up to the drainage divide but all areas to one or more other upstream hydrologic units. A unique hydrologic unit code is used to identify each
hydrologic unit. The Watershed hydrologic unit codes start with the 8-digit Subbasin (Cataloging Unit) number that contains the Watershed. Likewise the Subwatershed hydrologic unit codes start with the 10-digit Watershed number that contains the Subwatershed. 

A map unit symbol uniquely identifies each closed polygon. Each symbol is linked to a hydrologic unit code. The uniqueness of hydrologic unit codes while applying to hydrologic units does not carry over to polygons. Small islands offshore in coastal and lakeshore areas or in river deltas are given the same code as adjacent hydrologic units on the mainland.

Attribute data associated with a hydrologic unit code includes: 
non-contributing area (acres); 
names for each level of nesting (region, subregion, basin, subbasin, watershed and subwatershed);
codes for hydrologic units immediately downstream;
name of town where subwatershed outlet occurs;
information about type of subwatershed or watershed;
reference to human-caused modifications to stream flow within the watershed;
notes concerning delineation of hydrologic unit boundary.

Description of attributes by field from the Federal Standards for Delineation of Hydrologic Unit Boundaries
1) .pat attributes

Huc_8 : Eight Digit Hydrologic Unit Code - (REQUIRED)
A unique 8-digit code from the USGS map series "Hydrologic Unit Maps".  Use the existing code for the sub-basin where the subwatershed resides; do not change this code.  The same number should be used in every record that pertains to a subwatershed that resides within the same 8-digit sub-basin.Numbers were assigned in an upstream to downstream fashion. Where no downstream/upstream relationship could be determined numbers were assigned in a clockwise fashion.

Huc_10:	Ten Digit Hydrologic Unit Code - (REQUIRED)
This field provides a unique 10-digit code for each watershed.  Add two digits to the end of the existing 8-digit code, therefore resulting in a 10-digit number.  This same number should be used in every record that pertains to a subwatershed that resides within the same 10-digit watershed.Numbers were assigned in an upstream to downstream fashion. Where no downstream/upstream relationship could be determined numbers were assigned in a clockwise fashion. It should be noted that the polygons that cross into Idaho were numbered by Idaho and are not consistent with the above methods. Affected huc_8s include: 17040202, 17040204 and 17040104.

Huc_12:	Twelve Digit Hydrologic Unit Code - (REQUIRED)
This field provides a unique 12-digit code for each subwatershed.  Add two digits to the end of the existing 10-digit code, therefore creating a 12-digit number.Numbers were assigned in an upstream to downstream fashion. Where no downstream/upstream relationship could be determined numbers were assigned in a clockwise fashion. It should be noted that the polygons that cross into Idaho were numbered by Idaho and are not consistent with the above methods. Affected huc_8s include: 17040202, 17040204 and 17040104.

Acres: 	Acres - (REQUIRED)
Area of subwatershed including non-contributing areas calculated to acres as a whole number, no decimals.  The "Acres" field needs to be calculated from the "Area" field.

States: 	States - (REQUIRED)
The "States" field needs to include the names of all state(s) that the subwatershed falls within.  Use the 2-digit postal abbreviation in upper case and sort the state(s) in alphabetical order.  If using more then one abbreviation, separate with a comma with no space after the comma.

Ncontrb_a: Non-Contributing Area - (FIELD REQUIRED, ATTRIBUTES OPTIONAL)
Drainage areas that do not flow toward the outlet of any hydrologic unit are considered non-contributing.  If a non-contributing area is on the boundary between two or more hydrologic units, determine the low point along the non-contributing area boundary.  The non-contributing area should be associated with the hydrologic unit adjacent to the low point on the boundary. This attribute should be the total of the non-contributing areas within a hydrologic unit calculated in acres.

Hu_10_ds: Fifth Level Downstream Hydrologic Unit Code - (FIELD REQUIRED, ATTRIBUTES OPTIONAL)
Populate this field with the 10-digit code of the 5th level hydrologic unit that is receiving the majority of the flow from the watershed that the 6th level HU falls within.  Outlets created by ditching or other artificial drainage are not to be considered for this field. If an HU flows into an ocean or the Gulf of Mexico populate this field with "OCEAN" and if a HU flows into one of the Great Lakes use the term "LAKE".  If a HU flows across international borders use "CANADA" or "MEXICO" depending on which country the HU drains into.  If an HU is  a closed basin, then populate this record with the term "CLOSED BASIN".

Hu_10_name: 	Fifth Level Hydrologic Unit Name - (FIELD REQUIRED, ATTRIBUTES OPTIONAL)
This field is for officially recognized names only.  Populate this field by following the directions in subsection 6.3 "Watershed and Subwatershed Naming Protocol".  Populate this field with the identical name for all 6th level hydrologic units that fall within the same 10-digit HU. The name used to attribute the watershed should be used only once within a 4th level unit. Some 10-digit HU were assigned the huc_10 number when no GNIS name was identified on the DRG-Es.

Hu_10_mod: 		Fifth Level Hydrologic Unit Modifications - (REQUIRED)
This field should identify any type of modifications to natural overland flow that alters the location of the hydrologic unit boundary for a 10-digit watershed.  In the attribute field, identify from most significant to least significant modification(s).  Use one or more of the following abbreviations in uppercase to identify your modification(s).  If using more then one abbreviation, separate with a comma with no space after the comma.
SC - Stormwater Canal
ID - Irrigation Ditch
IT - Interbasin Transfer
BC - Barge Canal
SD - Stormwater Ditch
PD - Pipe Diversion
CD - Channel Diversion
NC - Non-Contributing
KA - Karst
LE - Levee
NM - No Modifications
OC - Overflow Channel
DM - Dam at outlet or HU boundary
OT - Other

Hu_10_type:    Fifth Level Hydrologic Unit Type - (REQUIRED)
Populate this field with the hydrologic unit type from the list provided that most closely identifies the watershed.   Use any of the one-digit abbreviations in uppercase that is provided in the list.
S - "Standard" hydrologic unit - Any land HU with drainage flowing to a single outlet point, excluding non-contributing areas. This includes areas or small triangular wedges between adjacent HU's that remain after classic hydrologic units are delineated.  Some examples include "true", "classic", "composite", and "remnant" hydrologic units.
C - "Closed Basin" hydrologic unit - A drainage area that is 100% non-contributing. This means all surface flow is internal, no overland flow leaves the hydrologic unit through the outlet point.
F - "Frontal" hydrologic unit - Areas along the coastline of lakes, oceans, bays, etc. that have more than one outlet.  These HU's are predominantly land with some water areas at or near the outlet(s).
W - "Water" hydrologic unit - Hydrologic units that are predominantly water with adjacent land areas, ex. lake, easturies, harbors.
I - "Island" hydrologic unit - A hydrologic unit that is one or more islands and adjacent water out to the toe of the shore face.
U - "Unclassified" hydrologic unit - A hydrologic unit that can't be defined or doesn't fit into one of the types that have been listed.

Hu_12_ds: Sixth Level Downstream Hydrologic Unit Code - (FIELD REQUIRED, ATTRIBUTES OPTIONAL)
Populate this field with the 12-digit code of the 6th level hydrologic unit that is receiving the majority of the flow from the subwatershed.  Outlets created by ditching or other artificial drainage are not to be considered for this field.  If a HU flows into an ocean or the Gulf of Mexico populate this field with "OCEAN" and if a HU flows into one of the Great Lakes use the term "LAKE".  If a HU flows across international borders use "CANADA" or "MEXICO" depending on which country the HU drains into.  If an HU is  a closed basin, then populate this record with the term "CLOSED BASIN".

Hu_12_name: Sixth Level Hydrologic Unit Name - (FIELD REQUIRED, ATTRIBUTES OPTIONAL)
This field is for officially recognized names only.  Populate this field by following the directions in subsection 6.3 "Watershed and Subwatershed Naming Protocol".  The name used to attribute the subwatershed should be used only once within a 6th level unit. Some 10-digit HU were assigned the huc_12 number when no GNIS name was identified on the DRG-Es.


Hu_12_mod:	Sixth Level Hydrologic Unit Modifications - (REQUIRED)
This field should identify any type of modifications to natural overland flow that alters the location of the hydrologic unit boundary for a 12-digit subwatershed.  In the attribute field, identify from most significant to least significant modification(s).  Use one or more of the following abbreviations in uppercase to identify your modification(s).  If using more than one abbreviation, separate with a comma with no space after the comma.
SC - Stormwater Canal
ID - Irrigation Ditch
IT - Interbasin Transfer
BC - Barge Canal
SD - Stormwater Ditch
PD - Pipe Diversion
CD - Channel Diversion
NC - Non-Contributing
KA - Karst
LE - Levee
NM - No Modifications
OC - Overflow Channel
DM - Dam at outlet or HU boundary
OT - Other

Hu_12_type:    Sixth Level Hydrologic Unit Type - (REQUIRED)
Populate this field with the hydrologic unit type from the list provided that most closely identifies the subwatershed.   Use any of the one digit abbreviations in uppercase that is provided in the list.
S - "Standard" hydrologic unit - Any land HU with drainage flowing to a single outlet point, excluding non-contributing areas. This includes areas or small triangular wedges between adjacent HU's that remain after classic hydrologic units are delineated.  Some examples include "true", "classic", "composite", and "remnant" hydrologic units.
C - "Closed Basin" hydrologic unit - A drainage area that is 100% non-contributing.  This means all surface flow is internal, no overland flow leaves the hydrologic unit through the outlet point.
F - "Frontal" hydrologic unit - Areas along the coastline of lakes, oceans, bays, etc. that have more than one outlet.  These HU's are predominantly land with some water at or near the outlet(s).
W - "Water" hydrologic unit - Hydrologic units that are predominantly water with adjacent land areas, ex. lake, easturies.
I - "Island" hydrologic unit - A hydrologic unit that is one or more islands and adjacent water out to the toe of the shore face.
U - "Unclassified" hydrologic unit - A hydrologic unit that can't be defined or doesn't fit into one of the types that have been listed.

ArcInfo (.pat) and ArcView Polygon Format
Item name Width	Output	Type  (ArcView)  	N.Dec.		Example
Huc_8        8	  8	 C			-              01080201
Huc_10	  10	10	C			-             0108020103
Huc_12	  12	12	C			-	010802010310
Acres	    8	12	F	N		0		026739
States	  11	11	C			-		KS,MO,OK
Ncontrb_a   8	12	F	N		0		357
Hu_10_ds   10	10	C		                -		1710020504
Hu_10_name	80	80	C		-                        Upper Blue River
Hu_10_mod	20	20	C		-	              CB,NC,ID
Hu_10_type	1	1	C		-		S
Hu_12_ds	12	12	C		-		171002050402
Hu_12_name	80	80	C		-            Drift Creek-Big Bear River
Hu_12_mod	20	20	C		-		SD,KA,PD
Hu_12_type	1	1	C		-		C

2) .aat attributes

Hu_level:	Hydrologic Unit Level - (REQUIRED)
This field provides the means to create cartographically pleasing maps.  Populate this field with the highest hydrologic unit level (smallest number) for the line  (arc) represented by the record.  Record the level using numbers 1 through 6 representing each level with 1 being the highest and 6 the lowest level.  An example would be if a line represents a region, subregion, basin, subbasin, watershed, and subwatershed boundary, then this cell would be populated with a 1 (Region).  Example two would be if a line is a subbasin, watershed, and subwatershed boundary, then the cell would get a 4 (Subbasin).  Use one of the levels provided in the list below.
Level    Digit#    Name
1          2          Region
2            4          Subregion
3            6          Basin
4            8          Subbasin
5            10        Watershed
6            12        Subwatershed

Linesource:	Line Spatial Data Source - (REQUIRED)
The Linesource should indicate the base map source(s) used to delineate at 1:24,000 scale.  Populate the field using one of the standardized code(s) listed below in uppercase.  If using more than one code, separate with a comma with no space after the comma.
TOPO24 - Delineation from hardcopy 1:24,000 scale topographic maps
TOPO25 - Delineation from hardcopy 1:25,000 topgraphic maps, only Alaska and Caribbean
TOPO63 - Delineation from hardcopy 1:63,360 topographic maps, only Alaska and Caribbean
DRG24 - Delineation from 1:24,000 scale Digital Raster Graphics
DRG25 - Delineation from 1:25,000 Digital Raster Graphics, only Alaska and Caribbean
DRG63 - Delineation from 1:63,360 Digital Raster Graphics, only Alaska and Caribbean
DEM10 - Derived from 10 meter Digital Elevation Model
DEM30 - Derived from 30 meter Digital Elevation Model
NED30 - Derived from 30 meter National Elevation Dateset Model
EDNA30 - (formally NED-H), derived from 30 meter Elevation Derivatives for National
Applications
BATH"scale" (ex. BATH24) - Interpreted from NOAA 1:24,000 scale bathymetric data
HYPSO"scale" (ex. HYPSO24)- Delineated from 1:24,000 scale contour data
ORTHO"scale" (ex. ORTHO12) - Interpreted from 1:12,000 scale Ortho-imagery
DEDEM10 - Drainage enforced 10 meter Digital Elevation Model
DEDEM30 - Drainage enforced 30 meter Digital Elevation Model
GPS - Derived from Global Positioning System
LIDAR - Derived from LIDAR
IFSAR - Derived from IFSAR data
OTH - Other
UNK - Unknown
All other reference and source maps not listed should be noted in the metadata.
Meta_id:	Metadata ID Number - (REQUIRED)
Metadata ID is a code that identifies which metadata file applies to the arc. In many cases there will only be one metadata file. However, in some cases more than one metadata file may be created to identify different groups and/or procedures used to produce the lines. These separate metadata files may be identified for each separate arc. The metadata ID should be a 4-character code starting with the 2-letter state postal code, followed by a 2-digit sequence number. For example "OK01", "ID02", etc.

ArcInfo Line (.aat) Attribute Format
Item name       Width		Output		Type		N.Dec.	   Example
Hu_level		1		1		I		-		6
Linesource	20		20		C		-       DEM30,DRG24,GPS
Meta_id		4		4		C		-		OK01
Entity and attribute detailed citation:
Federal Geographic Data Committee. 2001. Federal Standards for Delineation of Hydrologic Unit Boundaries.  June 12, 2001 Draft  with emailed amendments to certain polygon and arc attribute structure.
Direct spatial reference method: Vector
Attributes of Connecticut Watershed Boundary Dataset Line
Detailed descriptions of entity type, attributes, and attribute values for the data.
Name: depgis.DEP.WATERSHED_BOUNDARY_DATASET_LINE
Type of object: Feature Class
Geometry type: Polyline
Number of records: 792
Description:
This attribute table provides descriptive information on each boundary line. Attribute field (item) names need to be spelled exactly as shown and in the order specified.  If using ArcView to create the dataset, develope all your hydrologic unit boundaries and go through the instate review process, then convert to ArcInfo and create line (.aat) attribute table by using the "build" command.  Then populate the (.aat) attribute table in either ArcInfo or ArcView.  If using another software create an attribute table that is identical to the one shown.  If there are any questions, contact the National Cartography & Geospatial Center for assistance.
Source:
Federal Standards for Delineation of Hydrologic Unit Boundaries - FGDC Proposal, Version 1.0
Attributes
META_ID
Definition:
Metadata ID is a code that identifies which metadata file applies to the arc. In many cases there will only be one metadata file. However, in some cases more than one metadata file may be created to identify different groups and/or procedures used to produce the lines. These separate metadata files may be identified for each separate arc.   The metadata ID should be a 4-character code starting with the 2-letter state postal code, followed by a 2-digit sequence number. For example "OK01", "ID02", etc.
Alias: META_ID Type: String Width: 4 Precision: 0 Scale: 0
Attribute value codeset domain
CodesetDescription
NameFederal Standards for Delineation of Hydrologic Unit Boundaries, FGDC Proposal, Version 1.0
Source
Please refer to the Entity and Attribute Overview for valid values and definitions
Attribute definition source:
Federal Standards for Delineation of Hydrologic Unit Boundaries,  FGDC Proposal, Version 1.0
Shape
Definition:
Feature geometry.
Alias: HU_LEVEL Type: SmallInteger Width: 2 Precision: 5 Scale: 0
Attribute values: Coordinates defining the features.
Attribute definition source:
ESRI
HU_LEVEL
Definition:
This field provides the means to create cartographically pleasing maps.  Populate this field with the highest hydrologic unit level for the line  (arc) represented by the record.  Record the level using numbers 1  through 6 representing each level with 1 being the highest and 6 the lowest level.  An example would be if a line represents a region, subregion, basin, subbasin, watershed, and  subwatershed boundary, then this cell would be populated with a 1.  Example two would be if a line is a subbasin, watershed, and subwatershed boundary, then the cell would get a 4.  Use one of the levels provided in the list below.
Alias: OBJECTID Type: OID Width: 4 Precision: 10 Scale: 0
Attribute values: Sequential unique whole numbers that are automatically generated.
Attribute value codeset domain
CodesetDescription
NameFederal Standards for Delineation of Hydrologic Unit Boundaries, FGDC Proposal, Version 1.0
Source
Please refer to the Entity and Attribute Overview for valid values and definitions
Attribute definition source:
Federal Standards for Delineation of Hydrologic Unit Boundaries, FGDC Proposal, Version 1.0
OBJECTID
Definition:
Internal feature number.
Alias: Shape Type: Geometry Width: 4 Precision: 0 Scale: 0
Attribute values: Sequential unique whole numbers that are automatically generated.
Attribute definition source:
ESRI
SHAPE
Definition:
Feature geometry.
Alias: LINESOURCE Type: String Width: 20 Precision: 0 Scale: 0
Attribute values: Coordinates defining the features.
Attribute definition source:
ESRI
LINESOURCE
Definition:
The Linesource should indicate the base map source(s) used to delineate at 1:24,000 scale.  Populate the field using one of the standardized code(s) listed below in uppercase.  If using more than one code, separate with a comma with no space after the comma.
Alias: SHAPE.len Type: Double Width: 0 Precision: 0 Scale: 0
Attribute value codeset domain
CodesetDescription
NameFederal Standards for Delineation of Hydrologic Unit Boundaries, FGDC Proposal, Version 1.0
Source
Please refer to the Entity and Attribute Overview for valid values and definitions
Attribute definition source:
Federal Standards for Delineation of Hydrologic Unit Boundaries, FGDC Proposal, Version 1.0
SHAPE.len
Alias: SHAPE.len Type: Double Width: 0 Precision: 0 Scale: 0
ESRI Feature Description
Description of spatial objects in the data using the Environmental Systems Research Institute (ESRI) terminology.
Environmental Systems Research Institute (ESRI) terms
depgis.DEP.WATERSHED_BOUNDARY_DATASET_LINE
ESRI feature type: Simple
Geometry type: Polyline
Topology: FALSE
Feature count: 792
Spatial index: TRUE
Linear referencing: FALSE
SDTS Feature Description
Description of point and vector spatial objects in the data using the Spatial Data Transfer Standards (SDTS) terminology.
Spatial data transfer standard (SDTS) terms
depgis.DEP.WATERSHED_BOUNDARY_DATASET_LINE
Type: Complete chain
Count: 792
Feature class
Type: Point
Count: 519
+ Data Quality and Accuracy Information
General
Information about the fidelity of relationships, data quality and accuracy tests, omissions, selection criteria, generalization, and definitions used to derive the data.
Logical consistency report:
Certain node/geometry and topology (GT) polygon/chain relationships are collected or generated to satisfy topological requirements. (The GT-polygon corresponds to a hydrologic unit or a portion of a hydrologic unit at the edge of a quadrangle sheet.) Some of these requirements include: chains must begin and end at nodes, left and right GT-polygons are defined for each chain element and are consistent throughout. The tests of logical consistency are performed using vendor software. All internal polygons are tested for closure with vendor software.  All data are checked for common boundary lines (i.e., adjacent polygons with the same label).
Completeness report:
Subwatershed and Watershed naming conventions  differ from the newest standard specifications by being more descriptive of the stream reach which the hydrologic unit encompasses.  This was done to minimize confusion in areas where tributary stream names are similar.  Other attributes have been added to further clarify location within New England.  Subwatershed boundaries were delineated outside the state border in order to complete hydrologic units which straddled the border.
Attribute Accuracy
Accuracy of the identification of data entities, features and assignment of attribute values.
Attribute accuracy report:
Polygon identifiers are visually checked with the DRG backdrop and compared with other available information, such as tables of basins with their codes.
Positional Accuracy
Accuracy of the positional aspects of the data.
Horizontal accuracy report:
The accuracy of these maps is generally based on the contour information of corresponding DRGs. The differences in positional accuracy between the hydrologic unit boundaries and their digitized map locations is unknown. 

Hydrologic unit boundaries generally were digitized within 0.01 inches of their locations on the digitizing source.  Edge match locations are exact because the data were extracted from a New England-based hydrologic units layer which had been electronically edge-matched.
+ Data Source and Process Information
Data Sources
Information about the source data used to construct or derive the data.
Data source information
NRCS
Title: Subwatersheds for Connecticut
Originators: USDA-Natural Resources Conservation Service
Publisher: Natural Resources Conservation Service
Publication place: Tolland, Connecticut, USA
Publication date: 2001
Data type: Statewide coverage
Map scale denominator: 24000
Media: paper; USGS Digital Raster Graphics
Source contribution:
map delineation
Beginning date: 1969
Ending date: 1984
Currentness reference:
varies
Process Steps
Information about events, parameters, tolerances and techniques applied to construct or derive the data.
Process step information
Process Step 1
Process description:
Map delineation on paper topographic quads.
Process date: Unknown
Data Source used
CT DEP
Process Step 2
Process description:
Map digitizing
Process date: Unknown
Data Source used
CT DEP
Process Step 3
Process description:
Digitizing begins on NRCS Subwatersheds layer
Process date: 1997
Data Source used
NRCS
Title: Subwatersheds for Connecticut
Originators: USDA-Natural Resources Conservation Service
Publisher: Natural Resources Conservation Service
Publication place: Tolland, Connecticut, USA
Publication date: 2001
Data type: Statewide coverage
Map scale denominator: 24000
Media: paper; USGS Digital Raster Graphics
Source contribution:
map delineation
Beginning date: 1969
Ending date: 1984
Currentness reference:
varies
Process Step 4
Process description:
Data layer attribution, editing, review by CT NRCS and DEP personnel, USGS
Process date: 1997
Data Source used
NRCS
Title: Subwatersheds for Connecticut
Originators: USDA-Natural Resources Conservation Service
Publisher: Natural Resources Conservation Service
Publication place: Tolland, Connecticut, USA
Publication date: 2001
Data type: Statewide coverage
Map scale denominator: 24000
Media: paper; USGS Digital Raster Graphics
Source contribution:
map delineation
Beginning date: 1969
Ending date: 1984
Currentness reference:
varies
Process Step 5
Process description:
Delineation of New York hydrologic unit boundaries for units that cross border
Process date: 1998
Data Source used
NRCS
Title: Subwatersheds for Connecticut
Originators: USDA-Natural Resources Conservation Service
Publisher: Natural Resources Conservation Service
Publication place: Tolland, Connecticut, USA
Publication date: 2001
Data type: Statewide coverage
Map scale denominator: 24000
Media: paper; USGS Digital Raster Graphics
Source contribution:
map delineation
Beginning date: 1969
Ending date: 1984
Currentness reference:
varies
Process Step 6
Process description:
Edge match with Massachusetts: both arcs and attributes
Process date: 1999
Data Source used
NRCS
Title: Subwatersheds for Connecticut
Originators: USDA-Natural Resources Conservation Service
Publisher: Natural Resources Conservation Service
Publication place: Tolland, Connecticut, USA
Publication date: 2001
Data type: Statewide coverage
Map scale denominator: 24000
Media: paper; USGS Digital Raster Graphics
Source contribution:
map delineation
Beginning date: 1969
Ending date: 1984
Currentness reference:
varies
Process Step 7
Process description:
Edge match with available New York data (watershed level only), including digitizing of new hydrologic unit boundaries where necessary to complete all polygons which straddle state border.
Process date: 1999
Data Source used
NRCS
Title: Subwatersheds for Connecticut
Originators: USDA-Natural Resources Conservation Service
Publisher: Natural Resources Conservation Service
Publication place: Tolland, Connecticut, USA
Publication date: 2001
Data type: Statewide coverage
Map scale denominator: 24000
Media: paper; USGS Digital Raster Graphics
Source contribution:
map delineation
Beginning date: 1969
Ending date: 1984
Currentness reference:
varies
Process Step 8
Process description:
Edge match with Rhode Island: both arcs and attributes
Process date: 2000
Data Source used
NRCS
Title: Subwatersheds for Connecticut
Originators: USDA-Natural Resources Conservation Service
Publisher: Natural Resources Conservation Service
Publication place: Tolland, Connecticut, USA
Publication date: 2001
Data type: Statewide coverage
Map scale denominator: 24000
Media: paper; USGS Digital Raster Graphics
Source contribution:
map delineation
Beginning date: 1969
Ending date: 1984
Currentness reference:
varies
Process Step 9
Process description:
Review and editing/combining of smaller subwatersheds to better meet National Standard
Process date: 2000
Data Source used
NRCS, DEP
Process Step 10
Process description:
Attribute edits to update layer to newest Hydrologic Unit Digitizing Standard
Process date: 2001
Data Source used
NRCS
Title: Subwatersheds for Connecticut
Originators: USDA-Natural Resources Conservation Service
Publisher: Natural Resources Conservation Service
Publication place: Tolland, Connecticut, USA
Publication date: 2001
Data type: Statewide coverage
Map scale denominator: 24000
Media: paper; USGS Digital Raster Graphics
Source contribution:
map delineation
Beginning date: 1969
Ending date: 1984
Currentness reference:
varies
Process Step 11
Process description:
Metadata creation
Process date: 2001
Data Source used
NRCS
Title: Subwatersheds for Connecticut
Originators: USDA-Natural Resources Conservation Service
Publisher: Natural Resources Conservation Service
Publication place: Tolland, Connecticut, USA
Publication date: 2001
Data type: Statewide coverage
Map scale denominator: 24000
Media: paper; USGS Digital Raster Graphics
Source contribution:
map delineation
Beginning date: 1969
Ending date: 1984
Currentness reference:
varies
Process Step 12
Process description:
Reprojection to UTM NAD83
Process date: 2001
Data Source used
NRCS
Title: Subwatersheds for Connecticut
Originators: USDA-Natural Resources Conservation Service
Publisher: Natural Resources Conservation Service
Publication place: Tolland, Connecticut, USA
Publication date: 2001
Data type: Statewide coverage
Map scale denominator: 24000
Media: paper; USGS Digital Raster Graphics
Source contribution:
map delineation
Beginning date: 1969
Ending date: 1984
Currentness reference:
varies
Process Step 13
Process description:
Submission for National Review and Certification
Process date: 2001
Data Source used
NRCS
Title: Subwatersheds for Connecticut
Originators: USDA-Natural Resources Conservation Service
Publisher: Natural Resources Conservation Service
Publication place: Tolland, Connecticut, USA
Publication date: 2001
Data type: Statewide coverage
Map scale denominator: 24000
Media: paper; USGS Digital Raster Graphics
Source contribution:
map delineation
Beginning date: 1969
Ending date: 1984
Currentness reference:
varies
Process Step 14
Process description:
Conversion to Connecticut State Plane Coordinate System - Using ArcGIS 9.1 software, the line feature shapefile component to the Watershed Boundary Dataset for Connecticut (ct_hu12_lgeo83.shp) obtained from the NRCS ftp site was projected from geographic coordinates to the Connecticut State Plane Coordinate System of 1983 (NAD83) and named Watershed_Boundary_Dataset_Line.shp. Where necessary, excluded the FNODE#, TNODE#, LPOLY#, RPOLY#, and LENGTH attributes from both the Shapefile and Attribute Entity portion of the metadata because these attributes are only maintained by ArcInfo software with data in ArcInfo Coverage format. Also deleted polygon and node feature attribute definitions from the metadata prepared by NRCS because they do not describe line features. For cartographic purposes, made an ArcView 3 Legend file and ArcMap Layer file.
Organization: State of Connecticut, Department of Environmental Protection
Person: Howie Sternberg
Process date: 20051130
Process software and version: ArcGIS 9.1
Data Source used
NRCS
Title: Subwatersheds for Connecticut
Originators: USDA-Natural Resources Conservation Service
Publisher: Natural Resources Conservation Service
Publication place: Tolland, Connecticut, USA
Publication date: 2001
Data type: Statewide coverage
Map scale denominator: 24000
Media: paper; USGS Digital Raster Graphics
Source contribution:
map delineation
Beginning date: 1969
Ending date: 1984
Currentness reference:
varies
ESRI geoprocessing history
Description of ESRI geoprocessing commands, settings, and tolerances applied to the data.
ESRI geoprocessing command information
1 Process
Date: 20061204 Time: 235151
Tool location: C:\Program Files\ArcGIS\ArcToolbox\Toolboxes\Data Management Tools.tbx\CopyFeatures
Command issued: CopyFeatures C:\GeoData\Basin\shapes\Watershed_Boundary_Dataset_Line.shp C:\GeoData\Basin\geodatabase\Basin.mdb\Watershed_Boundary_Dataset_Line # 10000 0 0
2 Process
Date: 20061205 Time: 091904
Tool location: C:\Program Files\ArcGIS\ArcToolbox\Toolboxes\Data Management Tools.tbx\CopyFeatures
Command issued: CopyFeatures F:\GeoData\Basin\geodatabase\Basin.mdb\Watershed_Boundary_Dataset_Line "Database Connections\depdbs11@dep.sde\depgis.DEP.Watershed_Boundary_Dataset_Line" DEPVECTORSTATIC 10000 0 0
3 CopyFeatures_97
Date: 20081215 Time: 163046
Tool location: C:\Program Files\ArcGIS\ArcToolbox\Toolboxes\Data Management Tools.tbx\CopyFeatures
Command issued: CopyFeatures "Database Connections\10.18.8.94.depgis@DEP.sde\depgis.DEP.WATERSHED_BOUNDARY_DATASET_LINE" "Database Connections\062174-svr.depgis@DEP.sde\depgis.DEP.WATERSHED_BOUNDARY_DATASET_LINE" DEPFEATURESTATIC 0 0 0
+ Data Distribution Information
General
Description of the data known by the party from whom the data may be obtained, liability of party distributing data, and technical capabilities required to use the data.
Resource description:
Connecticut Watershed Boundary Dataset Line
Distribution liability:
Although these data have been processed successfully on a computer system at the U.S. Department of Agriculture, no warranty expressed or implied is made by the agency regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty. The U.S. Department of Agriculture will warrant the delivery of this product in computer readable format, and will offer appropriate adjustment of credit when the product is determined unreadable by correctly
adjusted computer input peripherals, or when the physical medium is delivered in damaged condition. Request for adjustment of credit must be made within 90 days from the date of this shipment from the ordering site. 

Neither the U.S. Department of Agriculture, nor any of its agencies are liable for misuse of the data, nor is it liable for damage, transmission of viruses, or computer contamination through the distribution of these data sets. 

The United States Department of Agriculture (USDA) prohibits discrimination in its programs on the basis of race, color, national origin, sex, religion, age, disability, political beliefs and marital or familial status. (Not all prohibited bases apply to all programs.) Persons with disabilities who require alternative means for communication of program information (Braille, large print, audio tape, etc.) should contact the USDA Office of Communications at (202) 720-5881 (voice) or (202) 720-7808 (TDD). 

To file a complaint, write the Secretary of Agriculture, U.S. Department of Agriculture, Washington, D.C. 20250, or call (202) 720-7327 (voice) or (202) 720-4107 (TDD). USDA is an equal opportunity employer.
Distribution Point of Contact
Contact information for the individual or organization distributing the data.
Organization: U.S. Department of Agriculture, Natural Resources Conservation Service, National Cartography and Geospatial Center
Phone: 817 334 5559
Fax: 817 334 5469
Address type: mailing address
Address:
P.O. Box 6567
City: Fort Worth
State or Province: Texas
Postal code: 76115
Country: U.S.
Standard Order Process
Common ways in which data may be obtained.
Digital form:
Format name: Arc Interchange File
Format version date: 20010712
Format specification:
non-compressed
Format information content:
spatial and keys
Size of the data: 3.200
Transfer size: 3.423
Digital transfer option:
Online option:
Computer information:
Network address:
Offline option:
Offline media: 8 mm cartridge tape
Recording capacity:
Recording density: 2.3
Recording density units: gigabytes
Recording format: tar
Offline option:
Offline media: 1/4-inch cartridge tape
Recording capacity:
Recording density: 150
Recording density units: megabytes
Recording format: tar
Fees: The charge for one data set is $XX.XX. A data set is one hydrologic unit boundary area in full quadrangle format and includes both spatial and attribute data.
Ordering instructions:
Call or write to organization listed under Distributor. Spatial line data are in DLG-3 optional format. Digital line graph files contain area records. A conversion legend is provided for each digital line graph file. Hydrologic unit codes and information concerning the hydrologic unit area are available in a companion ASCII attribute file.
Turnaround: 10 working days
+ Metadata Reference
Metadata Date
Dates associated with creating, updating and reviewing the metadata.
Last updated: 20010712
Last metadata review date: 2002
Language of metadata: en
Metadata Point of Contact
Contact information for the individual or organization responsible for the metadata information.
Organization: U.S. Department of Agriculture, Natural Resources Conservation Service
Person: GIS Specialist
Position: GIS Specialist
Phone: (860) 871-4011
Fax: (860) 871-4054
Address type: mailing address
Address:
344 Merrow Road
City: Tolland
State or Province: Connecticut
Postal code: 06084-3917
Metadata Standards
Description of the metadata standard used to document the data and reference to any additional extended profiles to the standard used by the metadata producer.
Standard name: FGDC Content Standards for Digital Geospatial Metadata
Standard version: FGDC-STD-001-1998
Time convention: local time
Metadata profiles defining additonal information:
Profile: ESRI Metadata Profile
FGDC Plus Metadata Stylesheet
Stylesheet: FGDC Plus Stylesheet
File name: FGDC Plus.xsl
Version: 2.2
Description: This metadata is displayed using the FGDC Plus Stylesheet, which is an XSL template that can be used with ArcGIS software to display metadata. It displays metadata elements defined in the Content Standard for Digital Geospatial Metadata (CSDGM) - aka FGDC Standard, the ESRI Profile of CSDGM, the Biological Data Profile of CSDGM, and the Shoreline Data Profile of CSDGM. CSDGM is the US Federal Metadata standard. The Federal Geographic Data Committee originally adopted the CSDGM in 1994 and revised it in 1998. According to Executive Order 12096 all Federal agencies are ordered to use this standard to document geospatial data created as of January, 1995. The standard is often referred to as the FGDC Metadata Standard and has been implemented beyond the federal level with State and local governments adopting the metadata standard as well. The Biological Data Profile broadens the application of the CSDGM so that it is more easily applied to biological data that are not explicitly geographic (laboratory results, field notes, specimen collections, research reports) but can be associated with a geographic location. Includes taxonomical vocabulary. The Shoreline Data Profile addresses variability in the definition and mapping of shorelines by providing a standardized set of terms and data elements required to support metadata for shoreline and coastal data sets. The FGDC Plus Stylesheet includes the Dublin Core Metadata Element Set. It supports W3C DOM compatible browsers such as IE7, IE6, Netscape 7, and Mozilla Firefox. It is in the public domain and may be freely used, modified, and redistributed. It is provided "AS-IS" without warranty or technical support.
Instructions: On the top of the page, click on the title of the dataset to toggle opening and closing of all metadata content sections or click section links listed horizontally below the title to open individual sections. Click on a section name (e.g. Description) to open and close section content. Within a section, click on a item name (Status, Key Words, etc.) to open and close individual content items. By default, the Citation information within the Description section is always open for display.
Download: FGDC Plus Stylesheet is available from the ArcScripts downloads at www.esri.com.