Identification_Information:
Citation:
Citation_Information:
Originator:
Regional Ecosystem Office
Publication_Date: 2002
Title:
8- 10- and 12- digit HUs for Oregon, Washington, and Northern California
Geospatial_Data_Presentation_Form: vector
digital data
Publication_Information:
Publication_Place:
Publisher:
Regional Ecosystem Office
Online_Linkage: http://www.reo.gov/gis/projects/watersheds/
Description:
Abstract.
This geospatial dataset is a hydrologic unit boundary layer that is at
the Subwatershed (12-digit) level. 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 area in acres,
non-contributing area, state(s) the HU falls within,
name for 5th and 6th level HU, 5th and 6th
level code for downstream hydrologic unit, and hydrologic unit
modifications. Each line has attributes
that describe the HU level (1-6), originating source for that line and a metadata
ID number that links the line to its associated metadata file.
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 REO and others.
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:
The following procedures were used to
produce this data set:
Hydrologic units were incorporated into
this dataset from an aggregate of pre-existing HUs. Some new HU boundaries were delineated using
flow lines and basins computed from 10- and 30-meter horizontal resolution
Digital Elevation based on flow derived from the elevation grid to determine
potential pour points. The DEM data is
derived from hypsography represented on 1:24000 USGS topographic
quadrangles. Additional hydrography data
was used as a template to control pourpoint locations for the delineated
HUs.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2002
Currentness_Reference: Publication date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -124.750000
East_Bounding_Coordinate: -116.375000
North_Bounding_Coordinate: 49.000000
South_Bounding_Coordinate: 38.000000
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Hydrologic units
Theme_Keyword: Watershed Boundaries
Theme_Keyword: Subwatershed Boundaries
Place:
Place_Keyword_Thesaurus: Counties and
County Equivalents of the
United States and the District of
Columbia (FIPS Pub 6-3)
Place_Keyword: California
Place_Keyword: Idaho
Place_Keyword: Nevada
Place_Keyword: Oregon
Place_Keyword: Washington
Constraints:
Access_Constraints:
None
Use_Constraints:
The Regional
Ecosystem Office 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 Regional Ecosystem
Office any authority for the decisions they make. The Regional Ecosystem Office 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.
Contacts:
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
Regional Ecosystem Office
Contact_Address:
Address_Type: Mailing address
Address:
Postal_Code: 97208-3623, Country:
Contact_Voice_Telephone: (503)-808-2165
Contact_Facsimile_Telephone: (503) 808-2163
Contact_Electronic_Mail_Address: jredmonds@fed.fs.us
Native_Data_Set_Environment: Windows_NT, 4.0, Intel ARC/INFO version
7.1.2
Cross_Reference:
Citation_Information:
Originator: Regional Ecosystem Office
Publication_Date: 2002
Title: 8- 10- and 12- digit HUs for
Oregon, Washington, and Northern California
Geospatial_Data_Presentation_Form: table,
map
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.
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.
Source_Information:
Source_Citation:
Citation_Information:
Originator: Titan Geospatial
Publication_Date: 2002
Title: 8- 10- and 12- digit HUs for
Oregon, Washington, and Northern California
Geospatial_Data_Presentation_Form:
table, map
Publication_Information:
Publication_Place:
Publisher:
Source_Scale_Denominator: 24000
Type_of_Source_Media: USGS Digital Elevation Model
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2002
Source_Currentness_Reference: various
Source_Citation_Abbreviation: NRCS
Source_Contribution: map delineation
Process_Step:
Process_Description: Hydrologic units
redelineated
Process_Date: 2002
Source_Used_Citation_Abbreviation: NRCS
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type:
Complete chain
Point_and_Vector_Object_Count: 2045395
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal
Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 10
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999600
Longitude_of_Central_Meridian:
-120
Latitude_of_Projection_Origin:
0.0
False_Easting: 500000.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method:
coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.61
Ordinate_Resolution: 0.61
Planar_Distance_Units: Meters
Geodetic_Model:
Horizontal_Datum_Name: North American
Datum of 1927
Ellipsoid_Name: Clarke 1866
Semi-major_Axis: 6378249.1
Denominator_of_Flattening_Ratio: 294.98
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: WATERSHED.PAT
Entity_Type_Definition: 12-Digit
Hydrologic Code Units
Entity_Type_Definition_Source: NRCS
Attribute:
Attribute_Label: ACRES
Attribute_Definition: Area of polygon in GIS
acres
Attribute_Definition_Source: Computed
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name:
Codeset_Source:
Attribute:
Attribute_Label: HUC_NUM
Attribute_Definition: Hydrologic Unit
Field Codes
Attribute_Definition_Source: BLM
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name:
Codeset_Source
Attribute:
Attribute_Label: HUC_TYPE
Attribute_Definition: Hydrologic Unit
Types
Attribute_Definition_Source: BLM
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name:
Codeset_Source
Attribute:
Attribute_Label: REGION_NAME
Attribute_Definition: 1st
Field Hydrologic Unit Naming Protocol
Attribute_Definition_Source: NRCS
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name:
Codeset_Source:
Attribute:
Attribute_Label: SUBREGION_NAME
Attribute_Definition: 2nd Field
Hydrologic Unit Naming Protocol
Attribute_Definition_Source: NRCS
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name:
Codeset_Source:
Attribute:
Attribute_Label: BASIN_NAME
Attribute_Definition: 3rdt
Field Hydrologic Unit Naming Protocol
Attribute_Definition_Source: NRCS
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name:
Codeset_Source:
Attribute:
Attribute_Label: SUBBASIN_NAME
Attribute_Definition: 4th Field
Hydrologic Unit Naming Protocol
Attribute_Definition_Source: NRCS
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name:
Codeset_Source:
Attribute:
Attribute_Label: WATERSHED_NAME
Attribute_Definition: 5th Field
Hydrologic Unit Naming Protocol
Attribute_Definition_Source: NRCS
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name:
Codeset_Source:
Attribute:
Attribute_Label: SUBWAT_NAME
Attribute_Definition: 6th Field
Hydrologic Unit Naming Protocol
Attribute_Definition_Source: NRCS
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name:
Codeset_Source:
Attribute:
Attribute_Label: CATCHMENT_NAME
Attribute_Definition: 7th Field Hydrologic Unit Naming Protocol
Attribute_Definition_Source: NRCS
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name:
Codeset_Source:
Attribute:
Attribute_Label: SUBCATCH_NAME
Attribute_Definition: 8th Field
Hydrologic Unit Naming Protocol
Attribute_Definition_Source: NRCS
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name:
Codeset_Source:
Attribute:
Attribute_Label: OLD_HUCNUM
Attribute_Definition: Historic Hydrologic
Unit Number
Attribute_Definition_Source: BLM
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name:
Codeset_Source:
Attribute:
Attribute_Label: STATES
Attribute_Definition: State(s) containing
HU polygon
Attribute_Definition_Source: NRCS
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name:
Codeset_Source:
Attribute:
Attribute_Label: NCONTRIB_DA
Attribute_Definition: Non-Contributing
Area
Attribute_Definition_Source: Computed
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name:
Codeset_Source:
Attribute:
Attribute_Label: DS_HUC5
Attribute_Definition: Fifth Level
Downstream HUC
Attribute_Definition_Source: NRCS
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name:
Codeset_Source:
Attribute:
Attribute_Label: DS_HUC6
Attribute_Definition: Sixth Level
Downstream Hydrologic Unit Code
Attribute_Definition_Source: NRCS
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name:
Codeset_Source:
Attribute:
Attribute_Label: HUC_MOD
Attribute_Definition: Hydrologic Unit
Modifications
Attribute_Definition_Source: NRCS
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name:
Codeset_Source:
Attribute:
Attribute_Label: COMMENT
Attribute_Definition: Comment
Attribute_Definition_Source: BLM
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name:
Codeset_Source:
Attribute:
Attribute_Label: REGION
Attribute_Definition: 1st
Field Hydrologic Unit Code
Attribute_Definition_Source: Based on
data from HUC_NUM item
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name:
Codeset_Source:
Attribute:
Attribute_Label: SUBREGION
Attribute_Definition: 2nd Field
Hydrologic Unit Code
Attribute_Definition_Source: Based on
data from HUC_NUM item
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name:
Codeset_Source:
Attribute:
Attribute_Label: BASIN
Attribute_Definition: 3rd Field
Hydrologic Unit Code
Attribute_Definition_Source: Based on
data from HUC_NUM item
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name:
Codeset_Source:
Attribute:
Attribute_Label: SUBBASIN
Attribute_Definition: 4th Field
Hydrologic Unit Code
Attribute_Definition_Source: Based on
data from HUC_NUM item
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name:
Codeset_Source:
Attribute:
Attribute_Label: WATERSHED
Attribute_Definition: 5th Field
Hydrologic Unit Code
Attribute_Definition_Source: Based on
data from HUC_NUM item
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name:
Codeset_Source:
Attribute:
Attribute_Label: SUBWAT
Attribute_Definition: 6th Field
Hydrologic Unit Code
Attribute_Definition_Source: Based on
data from HUC_NUM item
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name:
Codeset_Source:
Attribute:
Attribute_Label: CATCHMENT
Attribute_Definition: 7th Field
Hydrologic Unit Code
Attribute_Definition_Source: Based on
data from HUC_NUM item
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name:
Codeset_Source:
Attribute:
Attribute_Label: SUBCATCH
Attribute_Definition: 8th Field
Hydrologic Unit Code
Attribute_Definition_Source: Based on
data from HUC_NUM item
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name:
Codeset_Source:
Attribute:
Attribute_Label: FIRST_FIELD
Attribute_Definition: 2-digit identifier
Attribute_Definition_Source: Based on data
from HUC_NUM item
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name:
Codeset_Source:
Attribute:
Attribute_Label: SECOND_FIELD
Attribute_Definition: 2-digit identifier
Attribute_Definition_Source: Based on
data from HUC_NUM item
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name:
Codeset_Source:
Attribute:
Attribute_Label: THIRD_FIELD
Attribute_Definition: 2-digit identifier
Attribute_Definition_Source: Based on
data from HUC_NUM item
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name:
Codeset_Source:
Attribute:
Attribute_Label: FOURTH_FIELD
Attribute_Definition: 2-digit identifier
Attribute_Definition_Source: Based on
data from HUC_NUM item
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name:
Codeset_Source:
Attribute:
Attribute_Label: FIFTH_FIELD
Attribute_Definition: 2-digit identifier
Attribute_Definition_Source: Based on data
from HUC_NUM item
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name:
Codeset_Source:
Attribute:
Attribute_Label: SIXTH_FIELD
Attribute_Definition: 2-digit identifier
Attribute_Definition_Source: Based on
data from HUC_NUM item
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name:
Codeset_Source:
Attribute:
Attribute_Label: SEVENTH_FIELD
Attribute_Definition: 2-digit identifier
Attribute_Definition_Source: Based on
data from HUC_NUM item
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name:
Codeset_Source:
Attribute:
Attribute_Label: EIGHTH_FIELD
Attribute_Definition: 2-digit identifier
Attribute_Definition_Source: Based on
data from HUC_NUM item
Attribute_Domain_Values:
Codeset_Domain:
Codeset_Name:
Codeset_Source:
Detailed_Description:
Entity_Type:
Entity_Type_Label: WATERSHED.AAT
Entity_Type_Definition: 12-digit hydrologic unit codes
Entity_Type_Definition_Source: NRCS
Attribute:
Attribute_Label: HUC_LEVEL
Attribute_Definition: Hydrologic Unit
Level
Attribute_Definition_Source: NRCS
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1
Range_Domain_Maximum:7
Attribute:
Attribute_Label: LINESOURCE
Attribute_Definition: Line Spatial Data
Source
Attribute_Definition_Source: NRCS
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum:
Range_Domain_Maximum:
Attribute:
Attribute_Label: LINEVER
Attribute_Definition: Line Edit
Verification
Attribute_Definition_Source: BLM
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum:
Range_Domain_Maximum:
Attribute:
Attribute_Label: LINEDATE
Attribute_Definition: Line Edit Date
Attribute_Definition_Source: BLM
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum:
Range_Domain_Maximum:
Attribute:
Attribute_Label: LINEORG
Attribute_Definition: Line Edit
Organization
Attribute_Definition_Source: BLM
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum:
Range_Domain_Maximum:
Attribute:
Attribute_Label: METADATA_ID
Attribute_Definition: Metadata ID Number
Attribute_Definition_Source: NRCS
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum:
Range_Domain_Maximum:
Attribute:
Attribute_Label: COMMENT
Attribute_Definition: Comment
Attribute_Definition_Source: BLM
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum:
Range_Domain_Maximum:
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 10-digit Watershed number that contains the Subwatershed. Attributes associated with a hydrologic unit
code includes: ACRES, HUC_NUM, HUC_TYPE, REGION_NAME, SUBREGION_NAME, BASIN_NAME,
SUBBASIN_NAME, WATERSHED_NAME, SUBWAT_NAME, CATCHMENT_NAME, SUBCATCH_NAME,
OLD_HUCNUM, STATES, NCONTRIB_DA, DS_HUC5, DS_HUC6, HUC_MOD, COMMENT, REGION,
SUBREGION, BASIN, SUBBASIN, WATERSHED, SUBWAT, CATCHMENT, SUBCATCH,
FIRST_FIELD, SECOND_FIELD, THIRD_FIELD, FOURTH_FIELD, FIFTH_FIELD, SIXTH_FIELD,
SEVENTH_FIELD, EIGHTH_FIELD, HUC_LEVEL, LINESOURCE, LINEVER, LINEDATE, LINEORG,
METADATA_ID, COMMENT
Entity_and_Attribute_Detail_Citation:
Pacific Northwest Regional Hydrologic
Unit Boundary Database Attribute Standards
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Regional
Ecosystem Office
Contact_Address:
Address_Type: mailing address
Address:
City:
State_or_Province: OR
Postal_Code: 97208-3623
Country:
Contact_Voice_Telephone: (503) 808-2165
Contact_Facsimile_Telephone: (503) 808-2163
Contact_Electronic_Mail_Address: jredmonds@fs.fed.us
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: ARC EXPORT
Format_Version_Date:
Format_Specification:
Optional
Format Content Information: spatial
and attribute
File_Decompression_Technique: No compression
applied
Transfer_Size:
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: http://www.reo.gov/gis/projects/watersheds/
Access_Instructions: Local area
network
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_
Access_Instructions: Local area
network
Offline_Option:
Offline_Media: CD-ROM
Recording_Format: ISO 9660 Level 1
Fees: none
Ordering_Instructions: Call or write.
Turnaround: 10 working days
Metadata_Reference_Information:
Metadata_Date: 20020718
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person:
Contact_Organization: Regional Ecosystem
Office
Contact_Address:
Address_Type: mailing address
Address:
City:
State_or_Province:
Postal_Code: 97208-3623
Country:
Contact_Voice_Telephone: (503) 808-2165
Contact_Facsimile_Telephone: (503)808-2163
Metadata_Standard_Name: Content Standards for
Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998