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: Portland, Oregon

        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:     333 SW First Avenue, P.O. Box 3623,   City: Portland,   State_or_Province: Oregon

 Postal_Code: 97208-3623,  Country: USA

 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: 333 SW First Avenue, P. O. Box 3623

        City: Portland

        State_or_Province: OR

        Postal_Code: 97208-3623

        Country: USA

      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: 33 SW First Avenue, P.O. Box 3623

        City: Portland

        State_or_Province:  Oregon

        Postal_Code: 97208-3623

        Country: USA

      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