Hydrologic Unit Boundaries of the Cook Inlet Basin

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Tim Brabets

Publication_Date: 1998

Publication_Time:

Title: Hydrologic Unit Boundaries of the Cook Inlet Basin

Edition:

Geospatial_Data_Presentation_Form:

Series_Name Issue_Identification

Publication_Information:

Publication_Place: Anchorage

Publisher: USGS

Other_Citation_Details:

Online_Linkage: <URL:http://agdc.usgs.gov/data/usgs/water>

Description:

Abstract:

nawqa_huc is a polygon coverage of hydrologic unit boundaries within
the Cook Inlet Basin National Water-Quality Assessment (NAWQA)study area in
southcentral Alaska. A hydrologic unit is a region or area bounded by a
drainage divide and occupied by a drainage system. Each hydrologic unit
(drainage area) boundary and an 8-digit name (huc.code) is from the report
U.S. Geological Survey, 1987, Hydrologic unit map-1987-State of Alaska:
U.S. Geological Survey map, 1 sheet.

Purpose:

The purpose of this coverage is to define the extent and boundaries of drainage systems within the Cook Inlet Basin.

Supplemental_Information:

Procedures_Used: The hydrologic unit boundaries were drawn on the 1:250000 paper quadrangle maps. The boundaries were then digitized and entered into ARC-INFO. Using ARC-EDIT procedures, the data were edited where appropriate and then combined into one coverage.

Revisions:

Reviews_Applied_to_Data:

Boundaries drawn on the quadrangles were checked for accuracy by Bob Lamke and Tim Brabets. Documentation was reviewed by Roy Glass and Liska Snyder.

Related_Spatial_and_Tabular_Data_Sets:

Lamke, R.D., McIntire, J.A., and Brabets, T.P., 1995, Alaska Hydrologic Unit Codes, USGS written communication.

Other_References_Cited: U.S. Geological Survey, 1987, Hydrologic unit map - 1987- State of Alaska: U.S. Geological Survey map, 1 sheet.

Notes: None

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 19970424

Currentness_Reference:

Current as of April, 1997

Status:

Progress: Complete

Maintenance_and_Update_Frequency:

None planned.

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -154.85231357

East_Bounding_Coordinate: -146.05590611

North_Bounding_Coordinate: 63.79333933

South_Bounding_Coordinate: 58.43916036

Keywords:

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword:

NAWQA, Cook Inlet, Drainage Areas, Hydrologic Unit Codes, Alaska

Place:

Place_Keyword_Thesaurus: None

Place_Keyword: Cook Inlet - Southcentral Alaska

Stratum:

Stratum_Keyword_Thesaurus: None

Stratum_Keyword: None

Temporal:

Temporal_Keyword_Thesaurus: None

Temporal_Keyword: None

Access_Constraints:

n/a

Point_of_Contact USGS-WRD

Use_Constraints:

The coverage was developed using 1:250000 scale maps. Thus, users should be aware of the limitations if using smaller scales.

Point_of_Contact:

Data_Set_Credit:

Bob Lamke drew the boundaries on the 1:250000 maps as a volunteer project after he retired in 1993. Mark Inghram (Alaska Department of Natural Resources), Jackie McIntire, and Tim Brabets digitized and edited the boundaries.

Security_Information:

Security_Classification_System: None

Security_Classification: Unclassified

Security_Handling_Description: None

Native_Data_Set_Environment: dgux, 5.4R3.10, AViiON UNIX, ARC/INFO version 7.0.4

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report: See Entity_Attribute_Information

Quantitative_Attribute_Accuracy_Assessment:

Attribute_Accuracy_Value: See Explanation

Attribute_Accuracy_Explanation:

Attribute accuracy is described, where present, with each attribute defined in the Entity and Attribute Section.

Logical_Consistency_Report: Polygon and chain-node topology present.

Completeness_Report:

n/a

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

The boundaries of the hydrologic units were drawn on 1:250,000 paper maps. A map was placed on the digitizing tablet and four tick marks were digitized. If the RMS error for the 4 tick marks was less than 0.005, the hydrologic unit boundaries were digitized. If the RMS error was greater than 0.005, the tick marks were digitized again until the RMS error was less than or equal to 0.005.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

n/a

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator:

Publication_Date:

Title:

Source_Scale_Denominator: 250000

Type_of_Source_Media:

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date:

Source_Currentness_Reference:

Source_Citation_Abbreviation:

Source_Contribution:

Process_Step:

Process_Description: TBRABETS COPY /HOME/BOAT3/TBRABETS/TEMP/AK_HUC/AK_HUC

Source_Used_Citation_Abbreviation: None

Process_Date: 19951005

Process_Time: 1232

Source_Produced_Citation_Abbreviation: None

Process_Step:

Process_Description: TBRABETS ARCEDIT /PROJECTS/PROJ_SLED/AK.COVS/NAWQA_HUC

Source_Used_Citation_Abbreviation: None

Process_Date: 19970423

Process_Time: 1453

Source_Produced_Citation_Abbreviation: None

Process_Step:

Process_Description: TBRABETS COPY /PROJECTS/PROJ_SLED/AK.COVS/NAWQA_HUC

Source_Used_Citation_Abbreviation: None

Process_Date: 19970423

Process_Time: 1458

Source_Produced_Citation_Abbreviation: None

Process_Step:

Process_Description: TBRABETS ARCEDIT /PROJECTS/PROJ_SLED/NAWQA/NAWQA_HUC

Source_Used_Citation_Abbreviation: None

Process_Date: 19970423

Process_Time: 1526

Source_Produced_Citation_Abbreviation: None

Process_Step:

Process_Description: TBRABETS BUILD NAWQA_HUC POLY

Source_Used_Citation_Abbreviation: None

Process_Date: 19970424

Process_Time: 0730

Source_Produced_Citation_Abbreviation: None

Process_Step:

Process_Description: TBRABETS ARCEDIT /PROJECTS/PROJ_SLED/NAWQA/NAWQA_HUC

Source_Used_Citation_Abbreviation: None

Process_Date: 19970424

Process_Time: 0927

Source_Produced_Citation_Abbreviation: None

Process_Step:

Process_Description: TBRABETS BUILD NAWQA_HUC POLY

Source_Used_Citation_Abbreviation: None

Process_Date: 19970424

Process_Time: 0927

Source_Produced_Citation_Abbreviation: None

Process_Step:

Process_Description: TBRABETS ARCEDIT /PROJECTS/PROJ_SLED/NAWQA/NAWQA_HUC

Source_Used_Citation_Abbreviation: None

Process_Date: 19970424

Process_Time: 1015

Source_Produced_Citation_Abbreviation: None

Process_Step:

Process_Description: TBRABETS BUILD NAWQA_HUC POLY

Source_Used_Citation_Abbreviation: None

Process_Date: 19970424

Process_Time: 1016

Source_Produced_Citation_Abbreviation: None

Process_Step:

Process_Description: TBRABETS DOCUMENT NAWQA_HUC DELETE TBRABETS

Source_Used_Citation_Abbreviation: None

Process_Date: 19970424

Process_Time: 1427

Source_Produced_Citation_Abbreviation: None

Process_Step:

Process_Description: TBRABETS DOCUMENT NAWQA_HUC CREATE TBRABETS

Source_Used_Citation_Abbreviation: None

Process_Date: 19970424

Process_Time: 1511

Source_Produced_Citation_Abbreviation: None

Process_Step:

Process_Description: TBRABETS DOCUMENT NAWQA_HUC UPDATE TBRABETS

Source_Used_Citation_Abbreviation: None

Process_Date: 19970424

Process_Time: 1525

Source_Produced_Citation_Abbreviation: None

Process_Step:

Process_Description: TBRABETS DOCUMENT NAWQA_HUC UPDATE TBRABETS

Source_Used_Citation_Abbreviation: None

Process_Date: 19970425

Process_Time: 1528

Source_Produced_Citation_Abbreviation: None

Process_Step:

Process_Description: TBRABETS DOCUMENT NAWQA_HUC UPDATE TBRABETS

Source_Used_Citation_Abbreviation: None

Process_Date: 19970428

Process_Time: 1500

Source_Produced_Citation_Abbreviation: None

Process_Step:

Process_Description: TBRABETS DOCUMENT NAWQA_HUC UPDATE TBRABETS

Source_Used_Citation_Abbreviation: None

Process_Date: 19970620

Process_Time: 1422

Source_Produced_Citation_Abbreviation: None

Process_Step:

Process_Description: TBRABETS DOCUMENT NAWQA_HUC UPDATE TBRABETS

Source_Used_Citation_Abbreviation: None

Process_Date: 19980116

Process_Time: 0908

Source_Produced_Citation_Abbreviation: None

Process_Step:

Process_Description: TBRABETS DOCUMENT NAWQA_HUC UPDATE TBRABETS

Source_Used_Citation_Abbreviation: None

Process_Date: 19980120

Process_Time: 1429

Source_Produced_Citation_Abbreviation: None

Process_Step:

Process_Description: TBRABETS COPY /PROJECTS/PROJ_SLED/NAWQA/NAWQA_HUC

Source_Used_Citation_Abbreviation: None

Process_Date: 19980121

Process_Time: 1003

Source_Produced_Citation_Abbreviation: None

Process_Step:

Process_Description: TBRABETS DOCUMENT NAWQA_HUC UPDATE TBRABETS

Source_Used_Citation_Abbreviation: None

Process_Date: 19980122

Process_Time: 0739

Source_Produced_Citation_Abbreviation: None

Process_Step:

Process_Description: TBRABETS DOCUMENT NAWQA_HUC UPDATE TBRABETS

Source_Used_Citation_Abbreviation: None

Process_Date: 19980131

Process_Time: 0828

Source_Produced_Citation_Abbreviation: None

Process_Step:

Process_Description: TBRABETS LABELERRORS NAWQA_HUC

Source_Used_Citation_Abbreviation: None

Process_Date: 19980227

Process_Time: 0950

Source_Produced_Citation_Abbreviation: None

Process_Step:

Process_Description: TBRABETS NODEERRORS NAWQA_HUC DANGLE

Source_Used_Citation_Abbreviation: None

Process_Date: 19980227

Process_Time: 0950

Source_Produced_Citation_Abbreviation: None

Process_Step:

Process_Description: TBRABETS DOCUMENT NAWQA_HUC UPDATE TBRABETS

Source_Used_Citation_Abbreviation: None

Process_Date: 19980227

Process_Time: 0956

Source_Produced_Citation_Abbreviation: None

Process_Step:

Process_Description: TBRABETS DOCUMENT NAWQA_HUC UPDATE TBRABETS

Source_Used_Citation_Abbreviation: None

Process_Date: 19980227

Process_Time: 0959

Source_Produced_Citation_Abbreviation: None

Process_Step:

Process_Description: TBRABETS DOCUMENT NAWQA_HUC UPDATE TBRABETS

Source_Used_Citation_Abbreviation: None

Process_Date: 19980227

Process_Time: 1009

Source_Produced_Citation_Abbreviation: None

Cloud_Cover: n/a

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Vector

Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Point

Point_and_Vector_Object_Count: 31

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: String

Point_and_Vector_Object_Count: 264

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains

Point_and_Vector_Object_Count: 32

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Map_Projection:

Map_Projection_Name: Albers Conical Equal Area

Albers_Conical_Equal_Area:

Standard_Parallel: 55

Standard_Parallel: 55

Longitude_of_Central_Meridian: -154

Latitude_of_Projection_Origin: 50

False_Easting: 0.00000

False_Northing: 0.00000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair

Coordinate_Representation:

Abscissa_Resolution: 1.0

Ordinate_Resolution: 1.0

Planar_Distance_Units: METERS

Geodetic_Model:

Horizontal_Datum_Name: Unknown

Ellipsoid_Name: Clarke 1866

Semi-major_Axis: 6378206.4

Denominator_of_Flattening_Ratio: 294.98

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: NAWQA_HUC.PAT

Entity_Type_Definition: area and hydrologic unit code for each polygon

Entity_Type_Definition_Source: 1:250000 quadrangles of Alaska

Attribute:

Attribute_Label: -

Attribute_Definition: area and hydrologic unit code for each polygon

Attribute_Definition_Source: 1:250000 quadrangles of Alaska

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: -

Enumerated_Domain_Value_Definition:

Enumerated_Domain_Value_Definition_Source:

Attribute:

Attribute_Label: AREA

Attribute_Definition: Area of poly/region in square coverage units

Attribute_Definition_Source: Computed

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Positive real numbers

Enumerated_Domain_Value_Definition:

Enumerated_Domain_Value_Definition_Source:

Attribute:

Attribute_Label: PERIMETER

Attribute_Definition: Perimeter of poly/region in coverage units

Attribute_Definition_Source: Computed

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Positive real numbers

Enumerated_Domain_Value_Definition:

Enumerated_Domain_Value_Definition_Source:

Attribute:

Attribute_Label: NAWQA_HUC#

Attribute_Definition: Internal feature number

Attribute_Definition_Source: Computed

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Sequential unique positive integer

Enumerated_Domain_Value_Definition:

Enumerated_Domain_Value_Definition_Source:

Attribute:

Attribute_Label: NAWQA_HUC-ID

Attribute_Definition: User-assigned feature number

Attribute_Definition_Source: User-defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Integer

Enumerated_Domain_Value_Definition:

Enumerated_Domain_Value_Definition_Source:

Attribute:

Attribute_Label: HUC.CODES

Attribute_Definition: 8 digit hydrologic unit code

Attribute_Definition_Source: Interagency Hydrology Committee of Alaska

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value:

Enumerated_Domain_Value_Definition:

Enumerated_Domain_Value_Definition_Source:

Attribute:

Attribute_Label: LABEL

Attribute_Definition: Coded with a nonzero positive number for plotting purposes only

Attribute_Definition_Source:

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value:

Enumerated_Domain_Value_Definition:

Enumerated_Domain_Value_Definition_Source:

Detailed_Description:

Entity_Type:

Entity_Type_Label: NAWQA_HUC.AAT

Entity_Type_Definition: arc attribute table

Entity_Type_Definition_Source: 1

Attribute:

Attribute_Label: -

Attribute_Definition: arc attribute table

Attribute_Definition_Source: 1

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: -

Enumerated_Domain_Value_Definition:

Enumerated_Domain_Value_Definition_Source:

Attribute:

Attribute_Label: FNODE#

Attribute_Definition: Internal number of from-node

Attribute_Definition_Source: Computed

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Sequential unique positive integer

Enumerated_Domain_Value_Definition:

Enumerated_Domain_Value_Definition_Source:

Attribute:

Attribute_Label: TNODE#

Attribute_Definition: Internal number of to-node

Attribute_Definition_Source: Computed

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Sequential unique positive integer

Enumerated_Domain_Value_Definition:

Enumerated_Domain_Value_Definition_Source:

Attribute:

Attribute_Label: LPOLY#

Attribute_Definition: Internal number of poly to left of arc

Attribute_Definition_Source: Computed

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Sequential unique positive integer

Enumerated_Domain_Value_Definition:

Enumerated_Domain_Value_Definition_Source:

Attribute:

Attribute_Label: RPOLY#

Attribute_Definition: Internal number of poly to right of arc

Attribute_Definition_Source: Computed

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Sequential unique positive integer

Enumerated_Domain_Value_Definition:

Enumerated_Domain_Value_Definition_Source:

Attribute:

Attribute_Label: LENGTH

Attribute_Definition: Length of arc in coverage units

Attribute_Definition_Source: Computed

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Positive real numbers

Enumerated_Domain_Value_Definition:

Enumerated_Domain_Value_Definition_Source:

Attribute:

Attribute_Label: NAWQA_HUC#

Attribute_Definition: Internal feature number

Attribute_Definition_Source: Computed

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Sequential unique positive integer

Enumerated_Domain_Value_Definition:

Enumerated_Domain_Value_Definition_Source:

Attribute:

Attribute_Label: NAWQA_HUC-ID

Attribute_Definition: User-assigned feature number

Attribute_Definition_Source: User-defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Integer

Enumerated_Domain_Value_Definition:

Enumerated_Domain_Value_Definition_Source:

Attribute:

Attribute_Label: LINE

Attribute_Definition: Different numbers correspond to major drainages

Attribute_Definition_Source: Interagency Hydrology Committee for Alaska

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value:

Enumerated_Domain_Value_Definition:

Enumerated_Domain_Value_Definition_Source:

Overview_Description:

Entity_and_Attribute_Overview:

In nawqa_huc.pat, an attribute HUC.CODES refers to the hydrologic unit number
assigned to the particular polygon. In nawqa_huc.aat, an attribute LINE is a
'tag' for each arc and allows the user to plot the major boundaries if needed.

Entity_and_Attribute_Detail_Citation: Not Available

Distribution_Information:

Distributor:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Tim Brabets

Contact_Organization: USGS-WRD

Contact_Position: Hydrologist

Contact_Address:

Address_Type: mailing address

Address: 4230 University Drive, Suite 201

City: Anchorage

State_or_Province: AK

Postal_Code: 99508

Country: USA

Contact_Voice_Telephone: 907-786-7105

Contact_Facsimile_Telephone: 907-786-7150

Contact_Electronic_Mail_Address: tbrabets@usgs.gov

Hours_of_Service: 8:00 - 4:30 AST

Resource_Description: Alaska Geospatial Data Clearinghouse

Distribution_Liability: No liability is assumed

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: ARCG ARC/INFO Generate format

Format_Version_Number: 7.0.4

File_Decompression_Technique: gzip

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: <URL:http://agdcftp1.wr.usgs.gov/pub/usgs/water/nawqa_huc.tar.gz>

Fees: Free

Metadata_Reference_Information:

Metadata_Date: 19980227

Metadata_Contact:

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: Local Time

Metadata_Security_Information:

Metadata_Security_Classification_System: None

Metadata_Security_Classification: Unclassified

Metadata_Security_Handling_Description: None