11 Digit Hydrologic Unit Code - Watersheds Boundaries for Upper Susquehanna River Watershed
Table of Contents
IDENTIFICATION_INFORMATION
Citation:
Citation_Information:
Originator: Upper Susquehanna Coalition
Originator: US Geological Survey
Originator: US Department of Agriculture
Originator: Natural Resources Conservation Service
Publication_Date: May 1, 2002
Title: 11 Digit Hydrologic Unit Code - Watersheds Boundaries for
Upper Susquehanna River Watershed
Edition: 1
Geospatial_Data_Presentation_Form: Map
Publication_Information:
Publication_Place: Horseheads, New York
Publisher: Upper Susquehanna Coalition
Other_Citation_Details:
Original data from USGS, NRCS
Online_Linkage: www.u-s-c.org/
Larger_Work_Citation:
Citation_Information:
Originator:
Publication_Date:
Title:
Publication_Information:
Publication_Place:
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Online_Linkage:
Description:
Abstract:
This geospatial dataset is a hydrologic unit boundary layer
that is at the Subwatershed (11-digit) level for the Upper
Susquehanna River Watershed. The dataset was developed from
original USGS/NRCS HUC data from both Pennsylvania and New
York. The dataset was developed by delineating the boundary
lines on 1:24,000 base maps and digitizing the delineated
lines. Digital Elevation Model data may have been used in
part of the process to establish preliminary boundaries.
This data set consists of geo-referenced digital map data
and associated attributes. The hydrologic unit code
attached to each delineated polygon is linked to the
attribute data, which can contain information on the
official name of the watershed and the area in acres.
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 NRCS and others. The development
of this dataset was due to the need for a working, seamless
dataset across state lines.
This data set is intended as a tool for water-resource
management and planning activities, particularly for
site-specific and localized studies, which require the
amount of detail provided by a large-scale map.
Supplemental_Information:
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date:
Ending_Date:
Currentness_Reference:
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -77.9269
East_Bounding_Coordinate: -74.5775
North_Bounding_Coordinate: 42.9865
South_Bounding_Coordinate: 41.5970
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Waterheds
Theme_Keyword: 11 Digit HUC
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Upper Susquehanna River
Access_Constraints:
Upper Susquehanna Coalition Only
Use_Constraints:
For Internal Use Only
The U.S. Department of Agriculture, Natural Resources
Conservation Service, should be acknowledged as the data
source in products derived from these data. These data
should not be used at scales greater than 1:24,000.
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 of the data. Federal, state, or
local regulatory bodies are not to reassign to the Natural
Resources Conservation Service any authority for the
decisions they make. The Natural Resources Conservation
Service will not perform any evaluations of these maps or
purposes related solely to State or local regulatory
programs. 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.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Upper Susquehanna Coalition
Contact_Person: Chris Yearick
Contact_Position: GIS Coordinator
Contact_Address:
Address_Type: mailing and physical address
Address: 851 Chemung Street
City: Horseheads
State_or_Province: New York
Postal_Code: 14845
Country: USA
Contact_Voice_Telephone: 607-739-2009
Contact_Facsimile_Telephone: 607-739-4392
Contact_Electronic_Mail_Address: cdy3@cornell.edu
Hours_of_Service:
Native_Data_Set_Environment:
ArcView version 3.2 shapefile format
d:\av-data\usc\huc11_020501.shp
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DATA_QUALITY_INFORMATION
Attribute_Accuracy:
Attribute_Accuracy_Report:
Polygon identifiers are manually checked with the original
base map using the attribute file. Verification on polygon
identification continuity on each side of a neatline is
done visually on the screen as adjacent quad
representations are assembled into larger area data layers.
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, and the chains
representing the limits of the file (neatline) are free of
gaps. The tests of logical consistency are performed using
vendor software. The neatline is generated by connecting
the explicitly entered four corners of the digital file.
All data outside the enclosed region are ignored and all
data crossing geographically straight lines are clipped at
the neatline. Neatline straightening aligns the digitized
edges of the digital data with the generated neatline
(i.e., with the longitude/latitude lines in geographic
coordinates). All internal polygons are tested for closure
with vendor software and are checked on hard copy plots.
All data are checked for common boundary lines (i.e.,
adjacent polygons with the same label). Quadrangles are
edge matched within the Sub-basin area and edge locations
generally do not deviate from centerline more than 0.01 inches.
Logical_Consistency_Report:
Completeness_Report:
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Horizontal Positional Accuracy Report: The accuracy of
these maps is generally based on the contour information or
DEM data available for the base maps. Such data may be
supplemented with site visits to locate ridge lines for
hydrologic unit boundaries in flat terrain areas, changes
in drainage patterns due to man's activities. 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.
The digital map elements are edge matched against the data
for the adjacent quadrangle. Edge match locations generally
do not deviate from centerline to centerline by more than
0.01 inches.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator:
Publication_Date:
Title:
Edition:
Geospatial_Data_Presentation_Form: map
Publication_Information:
Publication_Place:
Publisher:
Other_Citation_Details:
Online_Linkage:
Larger_Work_Citation:
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Originator:
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Title:
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Online_Linkage:
Source_Scale_Denominator:
Type_of_Source_Media:
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Beginning_Date:
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Source_Citation_Abbreviation:
Source_Contribution:
Source_Information:
Source_Citation:
Citation_Information:
Originator: U.S. Department of Agriculture
Originator: Natural Resources Conservation Service
Publication_Date:
Title:
Edition:
Geospatial_Data_Presentation_Form: map
Publication_Information:
Publication_Place: Fort Worth, Texas
Publisher:
Other_Citation_Details:
Derived from original USGS/NRCS HUC Data
Online_Linkage:
Larger_Work_Citation:
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Title:
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Source_Contribution:
Process_Step:
Process_Description:
Source_Used_Citation_Abbreviation:
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Source_Produced_Citation_Abbreviation:
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Organization:
Contact_Person:
Contact_Position:
Contact_Address:
Address_Type: mailing and physical address
Address:
City:
State_or_Province:
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SPATIAL_DATA_ORGANIZATION_INFORMATION
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains
Point_and_Vector_Object_Count: 94
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SPATIAL_REFERENCE_INFORMATION
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 18
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999600
Longitude_of_Central_Meridian: -75.000000
Latitude_of_Projection_Origin: 0.000000
False_Easting: 500000.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: Coordinate pair
Coordinate_Representation:
Abscissa_Resolution:
Ordinate_Resolution:
Planar_Distance_Units: Meters
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Clarke 1866
Semi-major_Axis: 6378137.0000000
Denominator_of_Flattening_Ratio: 298.26
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ENTITY_AND_ATTRIBUTE_INFORMATION
Overview_Description:
Entity_and_Attribute_Overview:
Hydrologic Unit delineations are closed polygons that
encompass all area draining toward the lowest point (called
pour point) in the polygon. Because of nominal sizes for
the different hydrologic unit level: Watershed (40,000 to
250,000 acres) and Subwatershed (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 hydrologic unit codes
start with the 8-digit Sub-basin (sub-basin) number that
contains the Watershed. Likewise the Subwatershed
hydrologic unit codes start with the 11-digit Watershed
number that contains the Subwatershed. HUC boundaries were
joined across state lines. All data changes from original
USGS coverages were coordinated with each respective County
Conservation District. Some sheds had to be combined,
split, or re-delineated. In a couple of cases, a watershed
was split and a new HUC id number was needed. Others
(especially in PA) were combined and one of the original
HUC id's was chosen. Acreage was calculated by ArcView.
Attributes associated with a hydrologic unit code includes:
HUC_11 - 11 Digit HUC ID Number, Last4 - Last four digits
of HUC, Last3b - Last 3 digits of HUC, Nameb - Watershed
Name, Acres - Area in acres of watershed
Entity_and_Attribute_Detail_Citation:
HUC_11 - 11 Digit HUC ID Number
Last4 - Last four digits of HUC
Last3b - Last 3 digits of HUC
Nameb - Watershed Name
Acres - Area in acres of watershed
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DISTRIBUTION_INFORMATION
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Upper Susquehanna Coalition
Contact_Person: Chris Yearick
Contact_Position: GIS Coordinator
Contact_Address:
Address_Type: mailing and physical address
Address: 851 Chemung Street
City: Horseheads
State_or_Province: New York
Postal_Code: 14845
Country: USA
Contact_Voice_Telephone: 607-739-2009
Contact_Facsimile_Telephone: 607-739-4392
Contact_Electronic_Mail_Address: cdy3@cornell.edu
Hours_of_Service:
Resource_Description:
11 Digit HUC Watersheds forthe Upper Susquehanna (6 Digit
HUC) Watershed in ArcView Shapefile Format
Distribution_Liability:
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METADATA_REFERENCE_INFORMATION
Metadata_Date: May 1, 2002
Metadata_Review_Date:
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Upper Susquehanna Coalition
Contact_Person: Chris Yearick
Contact_Position: GIS Coordinator
Contact_Address:
Address_Type: Mailing and physical address
Address: 851 Chemung Street
City: Horseheads
State_or_Province: New York
Postal_Code: 14845
Country: USA
Contact_Voice_Telephone: 607-739-2009
Contact_Facsimile_Telephone: 607-739-4392
Contact_Electronic_Mail_Address: cdy3@cornell.edu
Hours_of_Service:
Metadata_Standard_Name: FGDC CSDGM
Metadata_Standard_Version: FGDC-STD-001-1998
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